We have not been taught to kill our bodies, but to kill our passions.
Source, in full
Wortley: Abba Isaac visited Abba Poemen and saw him pouring a little water over his feet. As he was quite familiar with him, he said to him: “How is it that some used severity and treated their bodies harshly?” Abba Poemen said to him: “We were not taught to slay the body but to slay the passions.”