Every mark on the paper is a political act.

"Purpose is what gives meaning to profit."

The true measure of a forest's worth isn't in board feet of timber, but in centuries of ecological balance.

Physical training is good, but it should be voluntary; forced learning does not stay in the mind.

The best way to find yourself is to lose yourself in the service of others.

如果你想飞翔，就必须放弃那些拖累你的事物。

The comfort of the rich depends upon an abundant supply of the poor.

儿童有着他自己的人格，他自身具有创造精神的美和尊严。这种美和尊严是永远不能磨灭的，所以他的纯洁而非常敏感的心灵需要我们最审慎的爱护。