1 John 5:9-10
9-10If we take human testimony at face value, how much more should we be reassured when God gives testimony as he does here, testifying concerning his Son. Whoever believes in the Son of God inwardly confirms God's testimony. Whoever refuses to believe in effect calls God a liar, refusing to believe God's own testimony regarding his Son.
11-12This is the testimony in essence: God gave us eternal life; the life is in his Son. So, whoever has the Son, has life; whoever rejects the Son, rejects life.