An oldie but goodie from many a childhood.

Here's one more from the greatest repository of Chinese Sayings, the Record of the Grand Historian, 毛遂自荐.

Here's one from the Book of Song that co-stars the Cheng Brothers of Neo-Confucian philosophy fame.

Time and again we see throughout history, in the movies, and in our own lives, the secret always has a way of getting out.