Faith and new birth: which comes first? Logically the new birth, since dead souls do not believe. Experientially they arrive together — believing is the first conscious act of the new life.

Family love follows: love the Father, love His children.

The world is overcome — not by trying harder, not by withdrawal, not by political reform — but by faith. Faith in whom? Verse 5 answers: in Jesus the Son of God.

The verse names the believer's posture as overcoming, present-tense. Not "shall overcome someday." Already.

Water and blood — most read this as Christ's baptism (water, the start of His public ministry) and the cross (blood). Early gnostics taught a Christ-spirit descended on Jesus at baptism and left before the cross; John denies it. The same Christ was at both.

The Spirit bears witness to the same Christ: the One baptized and the One crucified.

Eternal life is not a thing apart from Christ — a credit applied to one's account. It is in His Son. He is the life. To have Him is to have it; to lack Him is to lack it.

A verse that disposes of the idea that one can have eternal life and yet be uninterested in Christ.

Two clauses, total in their finality. The Son is the watershed. Everything else — religious practice, family inheritance, moral effort — falls to one side or the other of this verse.

A useful pastoral question: Do I have the Son? Not do I know about Him. Have Him.

The thesis statement of the whole letter. John's gospel was written that people might believe (John 20:31); his epistle, that they might know they have eternal life. The two go together.

Assurance is not arrogance. The Bible commands it. To refuse it is to refuse what God has written that one might possess.

The condition that gives prayer wings: according to his will. This is not a restriction; it is the path to confidence. Prayer aligned with His revealed will is prayer that always reaches Him.

Many readings. Likely meaning: there is a sin (probably the deliberate, settled rejection of Christ such as the false teachers John has been combatting) that has so set itself against the gospel that intercessory prayer is no longer the right response.

Most everyday Christian sin is not this. The verse is not designed to limit prayer for ordinary brothers and sisters in failure; it is designed to prepare us when someone hardens against the Lord completely.

Two opposite knowings. We are of God — true believers placed in His family. The whole world lieth in wickedness — Greek literally lieth in the evil one. Outside Christ, the human race lies in the lap of the deceiver.

The contrast is not a boast. It is a sober description of the geography.

One of the clearest direct affirmations of Christ's deity in the New Testament. This is the true God — the nearest antecedent is His Son Jesus Christ.

And He is eternal life — not has it, is it.

A startling final word. An idol is anything that takes the place reserved for God in the heart. The letter has spent five chapters teaching us who God truly is — the closing verse warns us not to substitute counterfeits.