我所见人与动物最显著的区别不在于理性，而在于运用理性的能力程度。
The most considerable difference I can see between men and animals is not in reason, but in the extent of the power of using it.
The truth is rarely pure and never simple.
在年轻的时候，请接受能为自己提供陡峭的学习曲线和艰苦的磨炼机会的工作。最初的工作是为人生打基础的，不要为了暂时的声望而轻易地接受一份工作。
I think that the most important thing is to be honest with yourself and with your audience.
儿童书籍应该挑战、安慰和激励。