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

In the context of computational learning, the concept of 'probably approximately correct' (PAC) learning provides a framework for understanding the efficiency and feasibility of learning algorithms.

家不是一个地方，而是那些让你感到归属的人。

笑，全世界便与你同声笑，哭，你便独自哭。