"The essence of life is not in the destination, but in the journey itself."

The most important questions of life are, for the most part, really only problems of probability.

The more we learn about the universe, the more we realize how much we have yet to discover.

The best way to ensure peace is to maintain a balance of power among the great powers.

Make women rational creatures, and free citizens, and they will quickly become good wives and mothers.

我认为我一生中从未感到无聊。总有事情可以思考。

成功不是幸福的关键。幸福是成功的关键。如果你热爱你所做的事情，你就会成功。