6 Believe thou therefore on Jesus Christ, Son of the living God, and a Son Only-Begotten, according to the Gospel which says, For God so loved the world, that He gave His Only-begotten Son, that whosoever believes in Him should not perish, but have everlasting life. And again, He that believes in the Son is not judged, but has passed out of death into life. But he that believes not the Son shall not see life, but the wrath of God abides on him. And John testified concerning Him, saying, And we beheld His glory, glory as of the only-begotten from the father—full of grace and truth: at whom the devils trembled and said, Ah! What have we to do with You, Jesus, Thou Son of the living God.
Source: Catechetical Lectures (New Advent)