If you know that He is absolutely righteous, you know [for certain] that everyone who practices righteousness [doing what is right and conforming to God’s will] has been born of Him.

and since we are sure that he hears all our prayers, we are sure that the petitions we presented to him, will be answered.

This is how we can be sure that we know him??y obeying his commands.

but whoever obeys his message really has the love of God in perfection in his heart. This is the way we can be sure that we are in union with him;

Children, it is the last hour. You have heard that Antichrist is coming, and many Antichrists have indeed appeared. So we may be sure that it is the last hour.

From that we can be sure that we are on the side of the truth, and satisfy our consciences in God's sight,

This is how we can be sure that we love the children of God: it is by loving God and obeying his commands.

By the fact that He has given us a portion of His Spirit we can be sure that we remain in union with Him and He in union with us.

The person who keeps his commandments abides in God, and God abides in him. This is how we can be sure that he remains in us: he has given us his Spirit.

Now if we admit the testimony of men, sure the testimony of God is greater: and this is the testimony of God, which He hath testified concerning his Son.

This is the [remarkable degree of] confidence which we [as believers are entitled to] have before Him: that if we ask anything according to His will, [that is, consistent with His plan and purpose] He hears us.

Little children, make sure no one deceives you; the one who practices righteousness is righteous, just as He is righteous;

I have written in this way to you who believe in the name of the Son of God, that you may be sure you have life eternal.