Jesus was God in human body. Like you have a body, soul and spirit. Is your soul part of you, or its part of somebody else? God became flesh and showed us the way.

John 8:58 King James Version (KJV)
58 Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am.

Jesus said that He was before Abraham, how could He existed in human body if He only became human male after Abraham?
John 1:14

14 And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.