"Thinking begins only when we have come to know that reason, glorified for centuries, is the most stiff-necked adversary of thought."

出自汉·桓宽《盐铁论·险固》。这句话以“地利”与“人和”、“武力”与“文德”的对比，阐明了实行仁政对于治国安邦的重要性。

I don't take anything for granted. I work for everything.

In science, we must be open to the possibility that our most cherished theories could be wrong.