The greatest cruelty is our casual blindness to the despair of others.

I'm the reason your brain won't think.

实现明天理想的唯一障碍是今天的疑虑。

The metropolis exacts from man as a discriminating creature a different amount of consciousness than does rural life.

The world needs more scientists who think like engineers, and more engineers who think like scientists.

可持续性不是一种趋势，而是我们对地球和后代的责任。