The only limit to our realization of tomorrow will be our doubts of today.
最深刻的真理往往最简单。
科学没有捷径，只有脚踏实地。
"Children's literature is the foundation for a lifetime of reading."
You can't change your elephant by direct force, but you can train it over time.
The farmer is the only man in our economy who has to buy everything at retail, sell everything at wholesale, and pay the freight both ways.