Jesus became human to save us. Through Him, our helper, advocate and redeemer, we can begin again. He is preparing heaven for us and will return to take us there.
God the eternal Son became incarnate in Jesus Christ. Through Him all things were created, the character of God is revealed, the salvation of humanity is accomplished and the world is judged. Forever truly God, He became also truly man, Jesus the Christ. He was conceived of the Holy Spirit and born of the virgin Mary. He lived and experienced temptation as a human being, but perfectly exemplified the righteousness and love of God. By His miracles He manifested God's power and was attested as God's promised Messiah. He suffered and died voluntarily on the cross for our sins and in our place, was raised from the dead, and ascended to minister in the heavenly sanctuary in our behalf. He will come again in glory for the final deliverance of His people and the restoration of all things. (John 1:1-3, 14; Col. 1:15-19; John 10:30; 14:9; Rom. 6:23; 2 Cor. 5:17-19; John 5:22; Luke 1:35; Phil. 2:5-11; Heb. 2:9-18; 1 Cor. 15:3, 4; Heb. 8:1, 2; John 14:1-3.)
Jesus is the Son of God, which means he is God the Son equal with God the Father and God the Holy Spirit Who are One without end.
The concept of the Son of God is in the Old Testament, the Jewish Holy text. See below;
Who but God goes up to heaven and comes back down? Who holds the wind in his fists? Who wraps up the oceans in his cloak? Who has created the whole wide world? What is his name--and his son's name? Tell me if you know! (Proverbs 30:4).
For those who believe, no proof is necessary.
For those who don't believe, no proof is possible.