What does Matthew 26:54 mean?
Earlier in the garden, Jesus was in agony (Matthew 26:36–38). He prayed to God the Father that, if possible, the impending suffering could pass from Him. He never wavered, however, in a commitment to submit to the will of God the Father above His own (Matthew 26:39). It's not that Jesus couldn't stop other people from harming Him. He is submissive to the Father's will, but Jesus revealed in the previous verse that the Father would also be responsive to Jesus' appeal to stop it. God the Father would send 12 legions of angels—72,000 beings of indescribable power (2 Kings 19:35)—to step in if Jesus asked Him to (Matthew 26:53).Jesus wants everyone to know that He is choosing, by His own determination, to submit to the Father's will (Philippians 2:8). He will cooperate with God's plan for this night and the following day (Matthew 16:21). He will not turn back now.
In addition, Jesus notes that this is a fulfillment of prophecy. Every Scripture about the suffering and death of the Messiah would be broken if He did not willingly go with those who had come to arrest Him. Jesus did not need Peter (Matthew 26:51–52) to fight for Him.