Log inSign up

1 John 2 · a question people ask

"I have not written to you because you don’t know the truth, but because you know it" (2:21). Why write, then?

In the text

The same verse goes on: "and because no lie is of the truth" (2:21). A few verses on, the letter says, "These things I have written to you concerning those who would lead you astray." (2:26) (tap astray). These notes say no more of it than the verses' words.

The verses

“I have not written to you because you don’t know the truth, but because you know it, and because no lie is of the truth.”
1 John 2:21 · World English Bible
“These things I have written to you concerning those who would lead you astray.”
1 John 2:26 · World English Bible

From Favor's study of 1 John 2

1 John 2: The world is passing away

1 John 2 says twice that something is passing away: "the darkness is passing away" (2:8), and "The world is passing away with its lusts" (2:17). In the same verse, beside the world passing away, it says, "he who does God’s will remains forever" (2:17).

In Favor, questions like this come up right where they arise as you read, with the Hebrew and Greek behind the words and how the chapter leads to Jesus.

Start your free week1 John 2 Bible study

First week free, then $10 a month per person

More questions about 1 John 2

All questions about 1 John →

Did we miss something?

We're a small team, and we can make mistakes. If something here looks wrong or unclear, tell us and we'll check it against the text.

Tell us

The best way to learn the Bible

Favor opens up every chapter as you read.

Favor is a Bible study app for your phone or computer. It takes you through the Bible one chapter at a time, a few minutes a day, and shows you what's really there: the words behind the words, the moments most people miss, and how the whole story fits together. For you. For everyone.

  • Every chapter explains itself

    As you read, short notes open up what's really going on, the details most readers walk past, and the honest questions people ask.

  • The Hebrew and Greek behind it

    Tap a highlighted word to see the original, how to say it, and what it means, checked against the original-language texts.

  • Every page leads to Jesus

    Watch promises made in Genesis kept in Jesus. Each line lights up on your map as you read.

  • Better together

    Read on your own, or start a Bible study with friends, family or your church. Answers stay sealed until you meet, then appear together.

  1. 1

    Start your free week

    Sign up in a minute with your email.

  2. 2

    Read a few minutes a day

    Each chapter opens itself up as you go. Tap what you're curious about.

  3. 3

    Bring your people, if you like

    Send one link. Everyone reads the same chapter, then meets to talk.

The best way to study the Bible.

Your small group or your church can use Favor for Bible study, or you can read by yourself.

First week free, then $10 a month per person

Questions like this, in every chapter

The best way to learn the Bible. For you. For everyone.

There's a seat for you at the table.

Start your free week

First week free, then $10 a month per person · Log in

Last reviewed October 12, 2026. Scripture quotations are from the World English Bible, which is in the public domain. Every answer cites the verses it rests on. What we believe · All Bible questions