What are the main points of this passage?

John uses the phrase ‘practice sin’ and ‘practice righteousness’ multiple times in this passage. Why does he do this? What is he trying to communicate? 

Compare this passage to Romans 6. What similarities do you observe?

Why does John say ‘the reason the world does not know us is that it did not know Him’? What does he mean by that?

What does John mean by saying ‘now we are God's children’ and ‘what we will be has not yet appeared’?

In what ways should Christians be different than people of the world? How is the Christian life different from any other kind of life?

John makes it clear in 3:8-9 that no genuine Christian continually practices sin. However, it’s clear from our experience that we can struggle with certain besetting sins for a long time and we often have to confess and repent of the same or similar sins throughout our lives. How can we keep a Biblical, balanced perspective on this?

Why is sanctification so important in the Christian life? How is sanctification related to justification?