艺术是沉思。它是心灵的愉悦，心灵在自然中探寻，并在那里预见到自然本身所激发的精神。
Art is contemplation. It is the pleasure of the mind which searches into nature and which there divines the spirit of which nature herself is animated.
有些人即使没有存心做坏事，可事实上事情仍会做错，引起不幸的后果。凡是粗心大意、看不出别人的好心好意，而且缺乏果断的人，都一样能害人。
自然不作飞跃。（拉丁文，指自然界的演变是连续的而非跳跃的）
写作是探索人类关系复杂性的一种方式。
The environment shapes behavior through the mechanism of reinforcement.
The best solutions often come from listening—to nature, to science, and to the people on the ground.
I'm not perfect and I don't pretend to be.
消化管代表了一条穿过整个生物体的管道。
A physical symbol system has the necessary and sufficient means for general intelligent action.