If you cannot do it, then teach.

未来不是现在提供的不同路径中选择的结果，而是一个被创造的地方——首先在思想和意志中创造，然后在行动中创造。

In mathematics, the journey from question to answer is often more enlightening than the answer itself.

坏人活着是为了吃与喝，而好人却是为了活着才吃与喝。

"A man who does not think for himself does not think at all."

Sometimes, the hardest thing in life is to know which bridge to cross and which to burn.

译文：对待亲戚族人刻薄寡恩的人，一定培养不出好儿孙，对待师长刻薄寡恩的人，一定培养不出好后代。赏析：对待任何人，我们都不能尖酸刻薄。说话带刺，做事冷酷的人处处树敌，处处示强，是很难有知心朋友的。处处伤害别人的人，内心没有一点怜悯同情之心，是无法培养出品行端正的子孙后代。