The challenge in computational learning theory is to understand the capabilities and limitations of learning algorithms.

Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

沾沾自喜时，应该约束反省；怒不可遏时，应该约束反省；怠倦懒惰时，应该约束反省；思想狂放时，应该省约束反。

Every film is a journey, and every journey is a film.

"The unexamined life is not worth living."

解释：君子有三件值得可惜的事：一辈子不学习，是第一件可惜的事；一天无所事事，是第二件可惜的事；一个人的名声败坏，是第三件可惜的事。