The one who believes in the Son of God has the testimony in himself; the one who does not believe God has made Him a liar, because he has not believed in the testimony that God has given concerning His Son.

Jesus, knowing that the Father had given all things into His hands, and that He had come forth from God and was going back to God,

I thank my God always concerning you for the grace of God which was given you in Christ Jesus,

Now we have received, not the spirit of the world, but the Spirit who is from God, so that we may know the things freely given to us by God,

And we know that the Son of God has come, and has given us understanding so that we may know Him who is true; and we are in Him who is true, in His Son Jesus Christ. This is the true God and eternal life.