The writer must be a free being, even if it costs him everything.

In mathematics, truth is somewhere out there in a place we don’t yet know, and the only way we can hope to find it is by exploring.

天空不是极限；它是开始。

大缓和时期是一段显著的经济稳定时期，但它为大衰退埋下了种子。

科学中的创造力来自于将别人没想到要联系的想法联系起来。