The Spirit himself bears witness with our spirit, that we are the children of God:

Likewise the Spirit also helps our weakness: for we know not what we should pray for as we ought but the Spirit himself makes intercession for us with groanings which cannot be uttered.

For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God has dealt to every man the measure of faith.

For none of us lives to himself, and no man dies to himself.

So then every one of us shall give account of himself to God.

Have you faith? have it to yourself before God. Happy is he that condemns not himself in that thing which he allows.

For even Christ pleased not himself; but, as it is written, The reproaches of them that reproached you fell on me.