历史既没有地球的古老，也没有孩子的纯真；它始终是人类激情与错误的产物。
History has neither the venerable age of the earth nor the innocence of the child; it is always the result of human passions and human errors.
最好的科学是双手弄脏而头脑清醒时完成的。
抱最好的希望，做最坏的打算。
永远保持节俭，除非是为了自己的热情。
【释义】过度保护抑制型儿童，等于剥夺他们学习应对恐惧的机会。
【讲解】：我十五岁时开始立志学习，三十岁时能立足与社会，四十岁时能通情达理遇事不再疑惑，五十岁时懂得了天命的道理，六十岁能听的进不同的意见，到了七十岁时已经达到随心所欲，想怎么做就怎么做，也不会超出规矩。
Every word is a world.
Never underestimate the power of persistence. Most people give up too soon.
There can be no permanent progress in the battle against hunger until the agencies that fight for increased food production and those that fight for population control unite in a common effort.
"Children's books should be as diverse as the children who read them."