In our reasonings concerning matter of fact， there are all imaginable degrees of assurance， from the highest certainty to the lowest species of moral evidence.

Not everything that is faced can be changed, but nothing can be changed until it is faced.

世界是一本书，不旅行的人只读了一页。

"Do not wait for leaders; do it alone, person to person."

相信自己和你的一切。知道你内心有比任何障碍都更强大的东西。

There is no short cut to achievement. Life requires thorough preparation.