An archer competing for a clay vessel shoots effortlessly, his or her skill and concentration unimpeded. If the prize is changed to a brass ornament, the hands begin to shake. If it is changed to gold, he or she squints as if going blind. The abilities do not deteriorate, but belief in them does, as he or she allows the supposed value of an external reward to cloud the vision.
ZhuangziThose who seek to satisfy the mind of man by hampering it with ceremonies and music and affecting charity and devotion have lost their original nature.
ZhuangziTao is the source of both fullness and emptiness. But it is itself neither fullness nor emptiness.
Zhuangzi