笑和哭都是对挫折和疲惫的反应。我自己更喜欢笑,因为之后需要清理的少。
"Mathematics is the science of patterns, and we study them to learn how to think logically, critically, and creatively."
The fountain of content must spring up in the mind, and they who have so little knowledge of human nature as to seek happiness by changing anything but their own dispositions will waste their lives in fruitless efforts.