Thematic Bible: Who the truth is not in

Dear friends, do not believe every spirit, but test the spirits to determine if they are from God, because many false prophets have gone out into the world. By this you know the Spirit of God: Every spirit that confesses Jesus as the Christ who has come in the flesh is from God, but every spirit that does not confess Jesus is not from God, and this is the spirit of the antichrist, which you have heard is coming, and now is already in the world.

Now this is the gospel message we have heard from him and announce to you: God is light, and in him there is no darkness at all. If we say we have fellowship with him and yet keep on walking in the darkness, we are lying and not practicing the truth.

Jesus replied, "If God were your Father, you would love me, for I have come from God and am now here. I have not come on my own initiative, but he sent me. Why don't you understand what I am saying? It is because you cannot accept my teaching. You people are from your father the devil, and you want to do what your father desires. He was a murderer from the beginning, and does not uphold the truth, because there is no truth in him. Whenever he lies, he speaks according to his own nature, because he is a liar and the father of lies.

(My little children, I am writing these things to you so that you may not sin.) But if anyone does sin, we have an advocate with the Father, Jesus Christ the righteous One, and he himself is the atoning sacrifice for our sins, and not only for our sins but also for the whole world. Now by this we know that we have come to know God: if we keep his commandments. read more.
The one who says "I have come to know God" and yet does not keep his commandments is a liar, and the truth is not in such a person.