Insanity is repeating the same mistakes and expecting different results.

The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.

Rudeness is the weak man's imitation of strength.

The power of abstraction is that it allows us to ignore irrelevant details and focus on the essential aspects of a problem.

司马牛忧伤地说：“别人都有兄弟，唯独我没有。”子夏说：“我听说过：‘死生有命，富贵在天’。君子敬业而不犯错误，对人恭敬而有礼。四海之内，皆兄弟。君子担心什么没有兄弟？”

一个真正的决定是通过你采取了新的行动来衡量的。如果没有行动，你就没有真正决定。