"Empty your cup"...good advice even if the cup is holding your balls I guess.
Bruce Lee, the legendary martial artist, once told a story about a highly-educated man who went to a Zen teacher to ask and acquire knowledge about Zen. As the Zen teacher began to explain things, the man would frequently interrupt with remarks like, "Oh, yes, we have that too…”
Finally the Zen teacher stopped talking. He began to serve tea to the man. He poured tea into the cup until it was full, and then kept pouring until the cup overflowed. "Enough!" the man once more interrupted, "No more can go into the cup!"
“Indeed, I see," answered the Zen teacher, "If you do not first empty the cup, how can you taste my cup of tea?"