"Every man has his secret sorrows which the world knows not; and often times we call a man cold when he is only sad."

对记忆的研究就是对人类本性的研究。

在探索宇宙的过程中，每一个被回答的问题都会引出更多的问题。

出自汉·桓宽《盐铁论·申韩》，也有说出自《盐铁论·险固》。有所准备就能制服别人；没有准备只能被别人制服。释义：有准备就能钳制住别人；没有准备就要受别人的钳制。

"When I believe in something, I'm like a dog with a bone."

We have not yet learned to think, but we are learning.