---
title: "Assurance of Salvation"
category: "theology"
description: "Can a believer know they are saved? An exegetical study of 1 John 5:11-13, Acts 4:12, and Ephesians 2:8-9 on the ground of salvation and the confidence Scripture says it produces."
tags: ["1-john", "john", "ephesians", "acts", "romans", "2-peter", "grace", "faith", "eternal-life", "method/word-study", "lang/greek"]
questions: ["How can I be sure I am saved?", "Can I lose my salvation?", "Am I saved by faith or by works?"]
draft: false
primary_passage: "1 John 5:11-13"
bible_references: ["Acts 4:9-12", "Ephesians 1:13-14", "Ephesians 2:1-10", "John 3:16-18", "John 5:24", "John 6:37-40", "John 10:27-29", "Romans 8:1", "Romans 8:15-17", "Romans 8:31-39", "Romans 10:9-13", "Joel 2:32", "2 Corinthians 5:17", "Philippians 1:6", "Titus 3:4-7", "Hebrews 7:25", "2 Timothy 1:12", "1 Peter 1:3-5", "2 Peter 1:5-11", "Matthew 1:21"]
date_created: 2026-08-24
date_modified: 2026-10-22
ai_provider_models:
  - anthropic/claude-opus-5
  - anthropic/claude-opus-5.5
  - anthropic/claude-sonnet-5
---

# Assurance of Salvation

A believer who has just sinned badly, or who has simply had a bad week of doubt, tends to ask one of
two questions: "Am I still saved?" or "Was I ever?" Scripture treats that question as answerable.
John writes to a congregation that had just watched some of its own members walk out the door (1
John 2:19). He tells the ones who stayed, "I write these things to you who believe in the name of
the Son of God, that you may know that you have eternal life" (1 John 5:13, ESV). *Know*. This study
asks what that knowledge rests on, and takes two other texts as its frame. There is no other name by
which anyone is saved (Acts 4:12). And salvation is not earned by works (Ephesians 2:8-9).

**Assurance of salvation rests on what Christ already did, not on how the week has gone.** Scripture
grounds it in an objective fact. Jesus is the only name under heaven by which anyone is saved, and
that salvation was received by grace through faith, itself God's gift rather than human achievement.
Scripture then confirms it subjectively, through the Spirit's own witness and a life of growing
obedience. Confirmation is not the foundation, and confusing the two is where assurance quietly
turns into either presumption or despair.

**In one sentence:** Assurance of salvation rests on the finished work of Jesus, the only name under heaven by which anyone is saved, received by grace through faith as God's gift; the Spirit's witness and a life of growing godliness confirm it, and the Son and the Father hold those who are His so that no one can snatch them away, so that you may know that you have eternal life.

## Key Takeaways

*(This section follows the [Key Takeaways](https://the-way.lewy.au/about/key-takeaways/) format — see that page for what each part is for.)*

### Lessons about Jesus

- Salvation exists in no one else and under no other name (Acts 4:12). Peter made this claim to
  the same council that had condemned Jesus to death weeks earlier, backed by a healing performed in
  that name the day before (Acts 3:1-10; 4:9-10).
- His own name is built on the claim: *Iēsous* renders the Hebrew *Yehoshua*/*Yeshua*, "YHWH is
  salvation," and Matthew makes the pun explicit: "you shall call his name Jesus, for he will save
  (*sōsei*) his people from their sins" (Matthew 1:21, ESV).
- He holds His own twice over: "I give them eternal life, and they will never perish, and no one
  will snatch them out of my hand," followed at once by "no one is able to snatch them out of the
  Father's hand" (John 10:28-29, ESV). One forcible-seizure verb is denied to any hostile hand,
  stated of both Son and Father.
- He goes on acting on a believer's behalf: He "always lives to make intercession" for those
  who come to God through Him (Hebrews 7:25, ESV) and is "able to guard until that day what has been
  entrusted to me" (2 Timothy 1:12, ESV).
- He began the work and is named as the one who will finish it: "he who began a good work in you
  will bring it to completion at the day of Jesus Christ" (Philippians 1:6, ESV).

### Memory verses

> ✝️ 1 John 5:11-13 (ESV)
>
> 11 And this is the testimony, that God gave us eternal life, and this life is in his Son.
> 12 Whoever has the Son has life; whoever does not have the Son of God does not have life.
> 13 I write these things to you who believe in the name of the Son of God, that you may know that
> you have eternal life.

> ✝️ Ephesians 2:8-9 (ESV)
>
> 8 For by grace you have been saved through faith. And this is not your own doing; it is the gift
> of God, 9 not a result of works, so that no one may boast.

> ✝️ Romans 8:1 (ESV)
>
> 1 There is therefore now no condemnation for those who are in Christ Jesus.

### Be Transformed

- **Think:** locate where your own sense of standing with God comes from day to day: the
  finished work named in these verses, or your most recent performance. Those produce very different
  answers on a bad day.
- **Attitude:** let 2 Peter 1:5-11's ordering stand: growth in godliness is what *confirms* a calling
  already given (v. 10), not what *earns* one. Guilt over slow growth is not the same problem as
  doubt about whether you were ever saved, and this text answers only the second.
- **Do:** if 1 John 2:19 describes a departure your own church or family has felt, name the
  specific fear that departure raised in you, and bring it to the testimony God gave "concerning his Son"
  (1 John 5:9-10, ESV).

### Prayer

Father, you gave your testimony concerning your Son Jesus before I ever asked for reassurance, and you
did not leave salvation to my own doing. Ground my confidence there, not in how the last week went.
Where I have confused evidence for a foundation, correct me; where I have used "grace" as cover for
indifference, correct that too. Let your Spirit bear witness with mine, the way your word says He
does. In Jesus' name. Amen.

## Study outline

- ["No other name," "not a result of works"](#no-other-name-not-a-result-of-works). Acts 4:12's *sōzō* pun before the Sanhedrin, and the grammar of Ephesians 2:8-9.
- ["That you may know"](#that-you-may-know-1-john-511-13-in-its-letter). 1 John's occasion, chapter 5's three witnesses, the two verbs for "know", and the longer reading of 5:13.
- [Objective ground, subjective confirmation](#objective-ground-subjective-confirmation). Christ's finished work as the ground, the Spirit's witness and growing godliness as confirmation, and someone who walks away.
- [Discussion questions](#discussion-questions). Five, for a group or on your own.

## "No other name," "not a result of works"

Acts 4:12 and Ephesians 2:8-9 come from different authors and different situations, years apart.
Together they answer the two questions doubt asks. *Am I saved by the right thing?* Only one name is under heaven by which anyone can be
saved (Acts 4:12). *Did I do enough of it?* No. Grace, received through faith, is not your own
doing to begin with (Ephesians 2:8-9). Assurance built on anything narrower than both of these
collapses the moment either question is pressed.

### The pun Peter makes to the Sanhedrin

**Acts 4:12.** Peter says this to the Sanhedrin the morning after healing a man lame from birth at
the temple gate (Acts 3:1-10), the same council that had condemned Jesus weeks earlier, at the
preceding Passover (Acts 4:5-6; Mark 14:53-64). Asked "by what power or by what name did you do this?" (4:7, ESV),
Peter answers with a pun the Greek makes plain. The lame man "has been healed" (*sesōstai*, a form
of *sōzō*, 4:9) by the name of Jesus. And "there is salvation (*sōtēria*) in no one else... by which
we must be saved (*sōthēnai*, again *sōzō*)" (4:12, ESV). One verb covers both the physical healing
everyone in the room had just seen and the spiritual salvation Peter is now claiming. The miracle
functions as the sermon's own exhibit. "Name" here carries the weight it does throughout Scripture:
the person and authority behind the label, a way of speaking native to the ancient Near East.
Salvation runs through the person the name points to, whatever word a given language uses to say
so. The same idiom sits behind "everyone who calls on the name of the Lord will
be saved" (Romans 10:13, ESV, quoting Joel 2:32). Joel's text names YHWH. Paul applies it to Jesus
four verses earlier, by way of "if you confess with your mouth that Jesus is Lord" (Romans 10:9,
ESV).

### The grammar of "not your own doing"

**Ephesians 2:8-9.** Unlike most of Paul's letters, Ephesians answers no specific crisis; it is
general instruction, probably meant to circulate among several churches in the Roman province of
Asia. Ephesus's own reputation for magic and the occult (Acts 19:19) sits behind the letter's
recurring emphasis on Christ's authority over every power. 2:1-10 opens by describing the readers'
former state under those powers. They were "dead in the trespasses and sins," walking
"following the prince of the power of the air" (2:1-2, ESV). Then "But God" (2:4, ESV) reverses it.
Verses 8-9 restate 2:5's claim ("by grace you have been saved") for emphasis, inside what is, in the
Greek, one long sentence running from 2:1 to 2:10. The verb *sesōsmenoi* ("have been saved," v. 8)
is a perfect passive participle: grammatically, a completed action with a result that stands. "This is not your own
doing" (Greek *touto*, neuter) cannot grammatically be pointing at "faith" alone, since *pistis*
("faith") is feminine. The MACULA syntax annotation for this verse resolves *touto*'s referent back
to the whole preceding clause, "you have been saved." Paul's neuter pronoun sweeps up the entire
transaction (grace, faith and all) as God's gift. And the very next verse
refuses to let that be misread as license: "we are his workmanship, created in Christ Jesus for good
works, which God prepared beforehand, that we should walk in them" (2:10, ESV). Not saved *by*
works; created *for* them.

## "That you may know" — 1 John 5:11-13 in its letter

First John is traditionally attributed to John the son of Zebedee, writing from Ephesus in the
decades after Jerusalem's fall in AD 70. It is often read as a response to an early Gnosticizing
threat. That movement's documented heyday runs a century or more later than this letter, so the
safer ground is what the text itself states plainly: "they went out from us, but they were not of
us" (1 John 2:19, ESV). Whatever its exact theology, that schism had shaken the confidence of the
members who stayed. The letter is not linear. The ESV Study Bible's introduction advises the reader
to "think paragraphs," because John circles back to the same handful of tests throughout. Those tests are right belief about who Jesus is, obedience, and love
for other believers.

### Chapter 5's witnesses, and the two verbs for "know"

Chapter 5 is where "believing" concentrates: six of the letter's nine uses of the verb fall here.
Verses 6-10 build a legal case for who Jesus is, using the two-or-three-witness standard of
Deuteronomy 17:6 and 19:15. The witnesses are "the Spirit and the water and the blood; and these
three agree" (5:8, ESV). That is John's own gloss on Jesus' baptism, His atoning death, and the
Spirit's ongoing inward testimony. Verses 11-12 state the content of that testimony as plainly as
anything in the letter: "God gave us eternal life, and this life is in his Son. Whoever has the Son
has life; whoever does not have the Son of God does not have life" (ESV). Verse 13 is John stepping
back to say why he wrote all of it. "That you may know" (Greek *hina eidēte*) uses the verb *oida*,
one of two Greek verbs 1 John renders "know," alongside *ginōskō*, which appears even more often
across the letter (25 occurrences against 15 for *oida*). Older commentary sometimes presses a hard
distinction between the two, *oida* for fixed settled knowledge and *ginōskō* for the experiential
kind. The letter's own usage does not support drawing that line sharply: both verbs cover the
same ground throughout 1 John. The sharper contrast sits with John's other book.
The Gospel states its purpose as being written "so that you may *believe* that Jesus is the Christ"
(John 20:31, ESV). That is an evangelistic aim, addressed to those not yet convinced, if the aorist
*pisteusēte* ("come to believe") is original; the manuscripts divide, NA28 brackets the σ, and SBLGNT
prints the present *pisteuēte* ("go on believing"), which the NLT renders "continue to believe". The letter's
purpose in 5:13 is addressed to "you who believe" already, so that they may *know* what they have.


### The longer reading of 5:13 in some versions

Some English versions (WEB among them) add a further clause to 1 John 5:13,
"and that you may continue to believe in the name of the Son of God", which is absent from the Greek
text behind the ESV. The SBLGNT critical text ends the verse at "the Son of God" with no second clause;
the addition reflects a longer, later manuscript tradition. It does not change the verse's basic
claim either way, but a reader comparing WEB against ESV here should not mistake the difference for
an error in either.

## Objective ground, subjective confirmation

These texts describe assurance running on two tracks.

**The objective ground is what Christ did**, stated as a finished fact. "There is therefore now no condemnation for those who are in Christ Jesus" (Romans 8:1,
ESV). "Whoever hears my word and believes him who sent me has eternal life. He does not come into
judgment, but has passed from death to life" (John 5:24, ESV). "Has" is present-tense possession. "If anyone is in Christ, he is a new creation" (2 Corinthians 5:17, ESV). Nothing
in this track depends on how the week has gone.

**The subjective confirmation is what the Spirit and a changed life supply**, and Scripture is
careful to keep these in the right order. "The Spirit himself bears witness with our spirit that we
are children of God" (Romans 8:16, ESV). Paul's readers cry "Abba! Father!" (8:15, ESV), the same
Aramaic word, left untranslated in the Greek text, that Jesus Himself used addressing God in
Gethsemane (Mark 14:36). The Spirit given at belief is described in commercial, legal language as a
down payment. Believers are "sealed with the promised Holy Spirit, who is the guarantee of our
inheritance" (Ephesians 1:13-14, ESV). The Greek is *arrabōn*, a term for a first installment that
legally secures the rest of a payment. Then there is growth in godliness: self-control,
steadfastness, brotherly affection, love, the list Peter gives in 2 Peter 1:5-7. That is what Peter
tells his readers to be "all the more diligent" to pursue, "to confirm your calling and election" (2
Peter 1:10, ESV). The ESV Study Bible's note on that verse states the ordering precisely: "Good
works are evidence of and give assurance of salvation, though they are never the basis for it."
Reverse that order, treating the fruit as the ground, and assurance becomes the performance-
based anxiety these texts were written to answer. [Partakers of the Divine Nature](https://the-way.lewy.au/christian-life/partakers-of-the-divine-nature/)
works through Peter's list as the fruit of the nature God gives.

### When someone walks away

That leaves one pastoral question: what about someone who once seemed to believe and then
walked away, the way John's own readers had just watched happen (1 John 2:19)? The texts gathered
here answer with security for those who are Christ's, not a guarantee that every profession was
genuine. "My sheep hear my voice, and I know them, and they follow me. I give them eternal life, and
they will never perish, and no one will snatch them out of my hand" (John 10:27-28, ESV). Jesus says
it of those who are His, and the Father backs it a second time (10:29). Paul's list in Romans
8:38-39 is exhaustive on purpose. "Neither death nor life, nor angels nor rulers, nor things present
nor things to come, nor powers, nor height nor depth, nor anything else in all creation, will be
able to separate us from the love of God in Christ Jesus our Lord" (ESV). The list omits the
believer's own future failures, because Paul has already spent Romans 8:1-4 establishing that no
condemnation remains for them. On its own terms, 1 John 2:19's departure is evidence that not every
visible profession was the real thing to begin with. That is a hard word. It is a different hard
word from "you can lose what you were actually given." For the believer who is truly Christ's but builds
with the world's wisdom, and for how to go after those who drift, see
[Saved as Through Fire](https://the-way.lewy.au/salvation/saved-as-through-fire/).

## Discussion questions

1. **The language.** In Ephesians 2:8 the neuter *touto*, "this is not your own doing" (ESV),
   reaches past the feminine *pistis* ("faith") to the whole clause "you have been saved." If your
   faith itself sits inside God's gift, what does that do to the worry that you have not believed
   well enough?
2. **The text in its context.** Peter told the council that had condemned Jesus weeks earlier,
   "there is salvation in no one else" (Acts 4:12, ESV), while the man he had healed stood beside
   them (Acts 4:14). What would that sentence have sounded like to those particular men?
3. **Christ.** 1 John was written to people who had just watched fellow believers walk away (1 John
   2:19). What does Christ's promise in John 10:28-29 to keep those who are His say to someone in
   that situation now?
4. **The hard part.** Ephesians 2:9 says salvation is "not a result of works" (ESV), yet 2 Peter
   1:10 tells believers to "be all the more diligent to confirm your calling and election" (ESV) by
   pursuing the qualities of 2 Peter 1:5-7. Where has the line between confirming a calling and
   earning one gotten blurred for you?
5. **Be transformed.** Read Romans 8:38-39's list slowly. What specific thing were you privately
   afraid might be the exception?

## References & Recommended Reading

- ESV Study Bible (Crossway), introduction to 1 John (Author and Title; Purpose, Occasion, and
  Background; Literary Features) and study notes on 1 John 5:1-13; Acts 4:1-22; Ephesians 1:13-14,
  2:1-10; Romans 8:1-17; John 10:26-29; 2 Peter 1:5-11; Philippians 1:6. Quoted briefly with
  attribution per this site's [copyright policy](https://the-way.lewy.au/about/copyright/); ESV Bible text quoted under
  Crossway's stated permissions.
- *Theological Wordbook of the Old Testament* (TWOT), root 929, <span dir="rtl">יָשַׁע</span> (*yashaʿ*, H3467), "deliver" — the
  root behind Jesus' own name.
- MACULA Greek Linguistic Datasets (Greek NT syntax and morphology, CC BY 4.0) and the SBL Greek New
  Testament, used to verify the *sōzō* wordplay in Acts 4:9-12, the *touto* referent in Ephesians
  2:8, and the *oida*/*ginōskō* distribution in 1 John.
- World English Bible (WEB) and American Standard Version (ASV), used for the 1 John 5:13 textual
  comparison noted above.