Faith is the great cop-out, the great excuse to evade the need to think and evaluate evidence. Faith is belief in spite of, even perhaps because of, the lack of evidence.

The only limits in life are the ones you make.

据说人无完人。又据说磨练出完美。你们对下词好吗？

Sustainability isn't an option—it's a responsibility we owe to the next generation.

解释：婚姻是难以预测的事情，既可能收获幸福，也可能招来祸患。婚姻事关人生的祸福，是家庭兴旺或衰败的根源，是人生十分重大的事情，好的婚姻给人以幸福，坏的婚姻给人以祸患。

真正的喜悦精神、崇高感、超越人类的感觉，这是最高卓越的试金石，在数学中同样可以在诗歌中找到。

"Books are the mirrors of the soul."

——〈民权主义第五讲〉，1924年4月20日