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The Worldly Hope men set their Hearts upon Turns Ashes—or it prospers; and anon, Like Snow upon the Desert's dusty Face, Lighting a little hour or two—is gone.

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.

Every experiment, whether successful or not, is a step toward understanding.

You have to believe in yourself when no one else does. That's what makes you a winner.

孔子說：“父母在世時，不要走遠，必須遠走時，一定要留下準確的地址。”