The truth is, I don't know what I'm doing. But I know I'm doing it with all my heart.
重点不是预测未来，而是为未来做好准备。
蒸汽机是改善人类状况的最有力工具。
The beauty of mathematics lies in its ability to simplify complex ideas into elegant structures.
Happiness is secured through virtue; it is a good attained by man's own will.
悲伤是私人的事。它需要多久就会持续多久。