We must listen to the science and act with urgency to address global energy challenges.

I'm not afraid to take a stand. Everybody come take my hand. We'll walk this road together, through the storm. Whatever weather, cold or warm.

与他人比较是让我们对自己的生活感觉更糟的可靠方法。

有趣的是，对于白人孩子来说，做黑人很酷，直到做黑人变得很难。

The way to learn about the mind is to reverse-engineer it: to figure out what natural selection designed it to accomplish.

The great challenge of the modern world is to create institutions that are strong enough to govern effectively but also accountable and responsive to the needs of citizens.

每个数学问题都有一个解决方案；只是需要时间和努力去找到它。