我们不能改变过去，但我们可以改变对过去的看法。

To travel is to write, and to write is to travel.

People calculate too much think too little.

Laws that have not their basis in nature are useless.

In science, we must be open to the possibility that our most cherished theories could be wrong.

True progress is measured not just in profits, but in the positive impact we have on people and the planet.

Meaning comes from belonging to and serving something beyond yourself.