You may have the worst of your worries when you most appear to be at ease.
Reason obeys itself; and ignorance submits to whatever is dictated to it.
艺术是一种驾驭世界混乱的方式。
在数学中,提出问题的艺术必须比解决问题更有价值。
In the search for truth, there are no final answers, only better questions.