What we gain by experience is more real and more solid than what we gain by reasoning.

Mental activity is the organism's way of engaging with the world.

一个人只要能够生活就感到满足的话，他就会生活的很愉快。我们愈不知道忍受，我们愈感到痛苦。

研究的坚持是关键；自然只向有耐心的人揭示它的秘密。

Science is a way of thinking much more than it is a body of knowledge.