Philippians 2:5-8
Have this mind among yourselves, which is yours in Christ Jesus, who, though he was in the form of God, did not count equality with God a thing to be grasped, but made himself nothing, taking the form of a servant, being born in the likeness of men.  And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross.