悲伤是私人的事。它需要多久就会持续多久。
成功不是拥有的,而是租来的,而且每天都要付租金。
旅程本身就是回报。
数学不仅仅是一种工具;它是一种思维方式。
The true way is along a rope that is not spanned high in the air, but just above the ground. It seems intended more to cause stumbling than to be walked upon.