So they set artificial limits. They're afraid of things that really wouldn't defeat them. They're ruled by fear, and their entire lives are inhibited that way. The same thing is true in our everyday lives. Some people think about nothing but money because it is supposed to satisfy your every desire, so for money they lose their honor.
Some people have their minds fixed on love and for that they lose both money and energy.
And yet happiness is never on just one side. The moon's reflection on the surface of the water moves incessantly. A very short poem on the secret of Zen and the martial arts, and also a great koan . The stream never flows backward. In a contest the mind must be like the moon, while the body and time slip past, past, past like the water in the stream.