A man asked Imam Hassan (as) "What are those ten things that are harder than each other?"
Imam (as) said, "Allah has made stone hard and made iron harder than it; because it breaks the stone and fire is stronger than iron because it melts the iron and water is more powerful than fire because it extinguishes the fire and the cloud is more powerful because it has control over water; and wind is more powerful than the cloud because it moves the cloud and more powerful than wind is the angel who controls it and more powerful than this angel is the angel of death who would capture his soul. And death is more powerful than the angel of death that he himself would be subjected to death. More powerful than death is the command of God Almighty, as by this death arrives and is warded off
