1 John 4:8

And by this we know that we have come to know Him, if we keep His commandments.

The one who says, “I have come to know Him,” and does not keep His commandments, is a liar, and the truth is not in him;

By this the children of God and the children of the devil are manifested: everyone who does not do righteousness is not of God, as well as the one who does not love his brother.

And we have come to know and have believed the love which God has in us. God is love, and the one who abides in love abides in God, and God abides in him.