Dear Samson, the Lord is not allowing your hair to grow back so you can pay back. Your personal vendetta isn't captured in God's data, and you can't smuggle it in. No wonder the same rain falls on both the righteous and the wicked. The moment Samson set his heart on revenge, he started exerting his might blindly. Yes, the Philistines had gouged his physical eyes, but not his spiritual eyes. Of course, he missed it, but he wouldn't have prayed amiss for the last time if only he had switched his sight.