你必须写那本想要被写出来的书。如果这本书对成年人来说太难,那么你就为孩子们写。
质量不是一个部门;它是一种心态。
No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.
物理学和数学之间的界限并不像人们想象的那么清晰。
我变得疯狂,伴随着长时间可怕的清醒。