There was once a general who fought wars with utmost bravery and courage. When he became older, he was troubled over the constant changes in the world; so he turned to Buddhism. After studying for some time, people would often ask him why things change; and he would answer, “Mountains and mountain paths never change, and it’s our minds that change.” The perfect person’s mind is like a mirror, neither taking nor welcoming, it responds but doesn’t store. So, when it’s time to be a general, you should be a general, and when it’s time to be a monk, be a monk. （From Zen Stories：The Staff and Shout of the Venerable Ones）