1 John 5:1, 5, 10-13, 20

Everyone who believes that Jesus is the Christ has been born of God, and everyone who loves the Father loves whoever has been born of him.

Who is it that overcomes the world except the one who believes that Jesus is the Son of God?

Whoever believes in the Son of God has the testimony in himself. Whoever does not believe God has made him a liar, because he has not believed in the testimony that God has borne concerning his Son. And this is the testimony, that God gave us eternal life, and this life is in his Son. Whoever has the Son has life; whoever does not have the Son of God does not have life. I write these things to you who believe in the name of the Son of God, that you may know that you have eternal life.

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. He is the true God and eternal life.