数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

The war on coal is a war on the American worker.

The work of art is a bridge between worlds.

The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

数学家的模式，就像画家或诗人的模式一样，必须是美丽的。

在能源领域，我们必须在进步与责任之间取得平衡 - 我们今天的行动塑造着明天的世界。

Love is the only thing that can make us forget the horror of existence.

Confidence comes from preparation and knowing your stuff.