数学是理性的音乐。

A journey is a person in itself; no two are alike. And all plans, safeguards, policing, and coercion are fruitless. We find after years of struggle that we do not take a trip; a trip takes us.

儿童不仅在心理上是被动的，而且像一个空花瓶，是一个有待于充满及塑造的生命。

Live within your income and save so you can invest. Learn what you need to learn.

真正的监狱不是由铁条制成的，而是由恐惧制成的。