实现明天理想的唯一障碍是今天的疑虑。
"Memory is the only paradise from which we cannot be expelled."
The beauty of mathematics lies in its ability to describe the world in a language that is universal.
The self is not so much a substance as a process, and it is the continual task of education to change the process, to develop its activities, and to guide it into channels of efficiency.
"A play is a wound that never heals."