Bina Makgwana looks at the story of Moses in Exodus 4:6-7 and asks whether there is any prayer too big for God to answer?
Then the Lord said, “Put your hand inside your cloak.” So Moses put his hand into his cloak, and when he took it out, the skin was leprous—it had become as white as snow. “Now put it back into your cloak,” he said. So Moses put his hand back into his cloak, and when he took it out, it was restored, like the rest of his flesh.
Exodus 4:6-7