The second person of the Holy Trinity, Christ, the Son of God, begotten before all ages by the Father without a mother, was begotten in time by the Virgin Mary the Theotokos without a father. He is the Logos, the Word of God, and He became flesh and dwelt among us, as says at the beginning of the Gospel of John. Jesus Christ is God in the flesh. This is the doctrine of the Incarnation, that God became man.
Our Lord Jesus is the Theanthropos, the God-man. He is not half God and half man, nor is He a hybrid of the two. Rather, He is fully God and fully man, perfect in His divinity and perfect in His humanity. He has two natures, joined together in the Incarnation without mixture, division, or confusion. As a result of being fully God and man, He also has two wills, one human will and one divine will to which the human one is submitted. He has two natures yet remains one person, one hypostasis.
Jesus is God, the second person of the Holy Trinity. He is the 'I AM' revealed to Moses. He is the way, the truth and the life. He is the God before the ages, come to Earth as a little child and then died on the cross as a man and rose from the dead. He and the Father are one, for He is consubstantial with the Father. During His passion and death on the cross, one of the Trinity suffered in the flesh.
He is the Messiah, the Christ-the Anointed One of God-foretold by the prophets of the Old Testament. He is the Savior of the world, the Lamb of God, the Son of Man. As described in the Gospels, Jesus Christ was born of a woman, grew into a man, preached, healed, taught his disciples, died in physical reality on the cross, and then rose bodily from the dead on the third day. He then ascended into Heaven and sat down at the right hand of the Father. Of all mankind, He alone is without sin.
His work on Earth was that of saving mankind, for the life of the world. Everything He did was for our salvation, from relating parables and being baptized by the John the Forerunner to His glorious death and resurrection. Because of who He is and of what He did for us, we have the opportunity to become by grace what He is by nature. That is, we can put on the divine, becoming partakers of the divine nature.