EMPTY CUP

A young man after becoming quite successful decided to visit his teacher to boast about his success. On arrival, the young man told the teacher he visited to learn more from him and then began to boast of his own achievements. He then told the teacher that he wanted to learn more and before the teacher said anything, he continued to boast of his own achievements and this went on and on.
When tea was served, the teacher poured tea into the young man cup. When the cup was full, the teacher continued to pour until it overflowed. When the tea overflowed, the young man told the teacher but the teacher continued pouring until the tea overflowed to the floor. The young man told the teacher again that the tea had overflowed.
The teacher then said, "Young man, I cannot teach you anything today because your cup is already full. Go home and empty your cup and then come and see me again if you want to learn more."