The most perfect education, in my opinion, is such an exercise of the understanding as is best calculated to strengthen the body and form the heart.

宇宙是一个巨大的地方，也许是最大的。

宇宙之美在于其复杂性和支配它的法则的简洁性。

如果你感到痛苦，那是因为你在成长。

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

Success in business requires training and discipline and hard work. But if you're not frightened by these things, the opportunities are just as great today as they ever were.