一本好的图画书应该完全不需要文字也能表达。
"Every man has his secret sorrows which the world knows not; and often times we call a man cold when he is only sad."
一个好的理论物理学家必须能够计算一切,但什么都不理解。
"Take calculated risks. That is quite different from being rash."
凡是能够说的,都能够说清楚;对于不可说的东西我们必须保持沉默。
"The only thing that is truly powerful is the human spirit."