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.
語言是一種工具，就像任何工具一樣，它可以用于善或惡。
解釋：沒有不犯錯(cuò)誤的完人，只要能及時(shí)改正自己的錯(cuò)誤，就是最好的了。
我不會(huì)讓世界偷走我的快樂。