I remember that when my grandmother was upset for some reason, she wished that she'd die, and all the grandkids who loved her would say "no, no, no ~ please don't die!" When Jesus revealed that he was going to be put to death, Peter reacted the same way like us and the Lord rebuked him for expressing what Satan wished. Wow! Even if it's God's will to do himself harm, we are not to stand in the way. It just shows how we must absolutely obey God, once we recognize his will. There are times we must go against our grain, common sense, or feelings; but if it's clearly doing God's will, we must ask no questions.