Son of God (Gk. υἱὸς τοῦ Θεοῦ, huios tou theou). (4:3; Matt 4:3, 5:9, Luke 1:35, Rom 8:3) Strong’s 5207
Jesus is the Son of God in two senses. One, He is Son of God by virtue of His birth as a human being through the agency of the Father. More than this though, He is the eternal Son of God, just as God is the eternal Father. He is Son precisely because God is Father, and vice-versa. Jesus is the “unique” Son of God in that, unlike human beings, as Son He shares the exact substance with the Father. Therefore He is divine, just as the Father and the Spirit are divine. As such, He is the second person of the trinity.