A LEARNED MAN'S MOMENT OF ZEN. OHmmmm

A LEARNED MAN once went to a ZEN Master to inquire about this stuff, this priceless, yet sought after intangible thing, this so called ZEN he hears of. As the ZEN Master talked, the LEARNED MAN would  listen intently but frequently interrupt with remarks like, "Oh yes, we have that too," and so forth. Finally the the ZEN Master stopped taking and began to serve tea to LEARNED MAN; however, he kept on pouring and the tea cup overflowed. "ENOUGH! NO more can go into the cup!" the Learned Man interrupted.
"Indeed, I see, " answered the Zen Master. " IF  you  do not first empty your cup HOW can you taste my cup of tea?"