This is how we may know that we have come to know Him, by always keeping his commandments.

and the truth is not in him; bit if any man obey his word, in him truly is the love of God made perfect. By this we come to know that we are in him.

I am writing to you, fathers, because you have come to know him who is from the beginning. I am writing to you, young men, because you have fully overcome the Evil One. I have written to you, little children, because you have learned to know the father.

Whoever continually abides in him does not habitually sin; whoever lives in sin has not seen him, nor come to know him.

By this we shall come to know that we are really of the truth,

By this you know the Spirit of God; every spirit that confesses that Jesus Christ is come in the flesh is from God;

By this we come to know that we are abiding in him, and he in us, because he has given us of his Spirit;

And we know that the Son of God is come, and has granted us and understanding, so that we may come to know him who is true. And we are in him who is true, even in his Son Jesus Christ. This is the true God, and life eternal.