我们知识的边界就是我们想象力的前沿。

彪悍的人生不需要解释。

The unexamined life is not worth living.

最好的建筑是那种消失的建筑，成为生活的一部分。

The teacher's task is not to implant facts but to place the subject to be learned in front of the learner and, through sympathy, emotion, imagination, and patience, to awaken in the learner the restless drive for answers and insights which enlarge the personal life.

"Libraries are the treasure chests of the world."

自由不是一种状态，而是一种态度。

世界上最好和最美的东西是看不见甚至摸不着的——它们必须用心去感受。

The hardest thing to explain is the glaringly evident which everybody had decided not to see.