You have to spend some energy and effort to see the beauty of math.
你必须花费一些精力和努力才能看到数学的美。
心理过程的功能是调解有机体的需求与环境的要求。
The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
过去从未死去。它甚至不是过去。
I believe in second chances because I know what it's like to need one.