"...I will strike the Shepherd, and the sheep will be scattered." Mark 14:27
That night Jesus was arrested and led away. "...one of the officers who stood by struck Jesus with the palm of his hand..", "Then they all forsook Him and fled." (John 18:22, Mark 14:50)
God's will, God's timing, fulfillment of Old Testament prophecy.
God's will is not always what I expect, most often not my own will. If I had lived in Jesus' time I would have expected Him to stay on earth until He was old. Until all the sick were healed, and all the sinners made clean. Maybe until He had established an earthly kingdom utopia. My vision would have been limited by my understanding of His purpose.
"For My thoughts are not your thoughts, nor are your ways My ways," says the Lord." Isaiah 55:8 We are limited by our inability to see beyond the very second we are living, for surely the expectation of what we believe will happen next can be interrupted by any number of circumstances!
Peter was ready to fight to the death rather than stumble that night. He spoke brave words and drew his sword. But when God's will was done, and Jesus was led away, Peter denied Him - just as Jesus said he would.
For all our brave words, for all our determination to stand for Christ - no matter what that might involve, we too will stumble. We may deny. Because God's will may involve things we don't expect.
If God allowed us to determine what was best, it would result in anything and everything but the best. Proverbs 14:12 says, " There is a way that seems right to a man, but its end is the way of death." Our will, our understanding of what needs to take place in order that we may spend eternity with God, can result in our spiritual death. There are not many ways to God- only one, Jesus Christ, "Jesus said to him, "I am the way, the truth, and the life. No one comes to the Father except through Me." (John 14:6). There are no works good enough to open Heaven's door, "For by grace you have been saved through faith, and that not of yourselves; it is the gift of God..." (Ephesians 2:8).
It was God's will that Jesus died for our sins. It is His will that we believe Jesus died for our sins. So we are left with a choice - do we accept God's will?