自信是关键，但你必须用实力来支撑它。

过去是一个我们可以造访但无法停留的地方。

生活是一系列的时刻，每个时刻都是一个故事。

改变的秘诀是将你所有的精力集中在建设新事物上，而不是与旧事物斗争。

People with a sense of fulfillment think it a good world and would like to conserve it as it is, while the frustrated favor radical change.

黑暗不能驱逐黑暗；只有光明能够做到。仇恨不能驱逐仇恨；只有爱能够做到。

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.