– 3 Nephi 14:7 (see also, Matt. 7:7, Luke 11:19, D&C 88:63, among many others)
A Buddhist scholar went to visit an old and respected monk to discuss Buddhism. The monk invited the scholar in and they sat down. While the monk prepared tea the scholar immediately began to expound upon all he had learned about Buddhism at the university. On and on he went while the old monk quietly listened and prepared the tea.
When the tea was ready, the scholar continued to speak even as the old monk poured the tea. Suddenly, the scholar stopped and jumped up as he realized that tea was pouring down onto his leg. The old monk had filled the scholar’s cup and was continuing to pour tea into his already full cup.
The scholar shouted, “You old fool. What are you thinking?”
The old monk calmly replied, “A cup that is already full has no room to receive.”