1 John 5:9-13
9: We accept human testimony, but surely the testimony of God is stronger, and the testimony of God is the witness He has borne to His Son
10 He who believes in the Son of God has the testimony in his own heart, but he who does not believe in God makes Him out to be a liar by refusing to accept God’s witness to His Son.
11: This is the witness: God has given us eternal life, and this life is found in His Son.
12: He who possess the Son possess life, he who does not possess the Son of God does not possess life
13: You have given your allegiance to the Son of God; this letter is to assure you that you have eternal life.