THE JAPANESE MASTER NAN-IN GAVE AUDIENCE TO A PROFESSOR OF PHILOSOPHY. SERVING TEA, NAN-IN FILLED HIS VISITOR'S CUP, AND KEPT POURING. THE PROFESSOR WATCHED THE OVERFLOW UNTIL HE COULD RESTRAIN HIMSELF NO LONGER: STOP! THE CUP IS OVERFULL, NO MORE WILL GO IN. NAN-IN SAID: LIKE THIS CUP, YOU ARE FULL OF YOUR OWN OPINIONS AND SPECULATIONS. HOW CAN I SHOW YOU ZEN UNLESS YOU FIRST EMPTY YOUR CUP?