The arc of the moral universe is long, but it bends toward justice.
我不认为我的作品是为儿童或成人而作。我只是认为它就是存在。
The only thing that interferes with my learning is my education.
理解心灵需要理解符号如何根植于感知和行动。
Progress is impossible without change, and those who cannot change their minds cannot change anything.