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我们唯一需要害怕的就是害怕本身。
The history of mathematics is a history of human curiosity and ingenuity.
When you are young, you think you will be happy when you are older. But then you get older and you realize you were happy when you were young.
You have to be unique, and different, and shine in your own way.
一个心理过程的价值在于它的生存效用。