The capacity to be alone is the capacity to love. It may look paradoxical to you, but it's not.

The best moments in our lives are not the passive, receptive, relaxing times… The best moments usually occur if a person’s body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.

You can pay for school but you can't buy class.

Causality is the fabric of the universe, and probability is its language.

The smallest details often hold the greatest truths.

一个过程不是其各部分的总和，而是力量的动态相互作用。