The title "Son of God" Signifies the Unique and eternal Relationship of Jesus Christ to God his Father: he is the only Son of the Father (cf Jn 1:14, 18; 3:16, 18); he is God himself (cf Jn 1:1). To be a Christian, one must Believe that Jesus Christ is the Son of God (cf Acts 8:37; 1 Jn 2:23).