The Tao of nurturing life requires that one keep oneself as fluid
and flexible as possible. One should not stay still for too long, nor
should one exhaust oneself by trying to perform the impossible tasks. One
should learn how to exercise from nature by observing the fact that flowing
water never stagnates and a busy door with active hinges never rusts or rots.
Why? Because they exercise themselves perpetually and are almost always
moving.
