21. Who resembles a person who satisfies his passions? He is like a person who, after being struck down with his enemy's arrows, then takes them with his hands and pierces his own heart with them. He who opposes passions is like a person that is showered with his enemy's arrows, but remains untouched because he is dressed in steel. One who has eradicated his passions, is like a person that although under a torrent of arrows, either shatters them or returns them into the hearts of his enemies — just as the Psalm states: "Their sword shall enter their own heart, and their bows shall be broken" (Psalm 37:15).