There's a real correlation between a society that tells people that they can do anything, and the existence of low self-esteem. So that's another way in which something quite positive can have a nasty kickback. There is another reason why we might be feeling more anxious --about our careers, about our status in the world today, than ever before. And it's, again, linked to something nice. And that nice thing is called meritocracy.

The task of psychology is to analyze the contents of consciousness into its elements.

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 past is always there, and it's always different every time you look at it.