The past, like the future, is indefinite and exists only as a spectrum of possibilities.

人类大脑有一种原始的自我防御机制，会否定所有对大脑产生过大压力而无法处理的现实。

You have to believe in the reality of the world and the reality of the people in it.

"Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them."

The world needs reliable energy, and coal still plays a critical role in providing it.

A man knows when he is growing old because he begins to look like his father.