I see Jesus human nature of when he said "I Thirst," His tongue is stuck upon the roof of his mouth, his lips are parched, waiting for something that will wet his lips so that he can cry out in a shout his victorious last words. "Father, into Thy hands I commend My Spirit."
Jesus drank the cup of suffering so that you and I can be made whole. One day we who believed in Him will have everlasting life with the King of Kings. He will still be a servant because He will be the one serving us at the "Great Banquet." Amen
Jesus was in obedience to the will of the Father.