儿童的进步不是取决于年龄，而是取决于能够自由地观看他周围的一切。
我不在乎别人怎么说，我要做我想做的事。
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
宇宙不仅比我们想象的更奇怪，它比我们能想象的还要奇怪。
"I don't think of my work as being for children or for adults. I just think of it as being."
从n对观测值的样本中获得的相关系数的可能误差是sqrt((1-r²)/(n-2))。
A writer is, after all, only half his book. The other half is the reader and from the reader the writer learns.