If Jesus is God how can he be the mediator between God & man ?

Jesus chose to come to earth and become a man; and that is the way He became the mediator between God and man. He is God, but set aside His equality with God to save mankind. Philippians 2:6-11 says, Who, being in the form of God, thought it not robbery to be equal with God: But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men: And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross. Wherefore God also hath highly exalted him, and given him a name which is above every name: That at the name of Jesus every knee should bow, of [things] in heaven, and [things] in earth, and [things] under the earth; And [that] every tongue should confess that Jesus Christ [is] Lord, to the glory of God the Father. Jesus is the expression of the Godhead to mankind; as He represented both the Father and the Holy Spirit when He was on earth. All three are God, but this can only be understood by those with spiritual understanding; not those who use only their natural understanding. Romans 10:8-10 is how anyone can be born again.