唯一真正的监狱是恐惧，唯一真正的自由是从恐惧中解脱。
The only real prison is fear, and the only real freedom is freedom from fear.
Quality is remembered long after price is forgotten.
我们从这样的假设开始：任何学科都可以以某种智力上诚实的形式有效地教给处于任何发展阶段的任何孩子。
预测未来的最好方法就是发明它。
Escribir es un acto de libertad y de rebeldía.
当孩子被放在自然环境里，他会显示出自己的能力。
Knowledge is represented in distributed patterns of activation across networks of neurons.
"A nation that destroys its soils destroys itself. Forests are the lungs of our land, purifying the air and giving fresh strength to our people."
The wild is a place of beauty. To survive, you have to appreciate it.