Nothing is worth more than this day. You cannot relive yesterday. Tomorrow is still beyond your reach.

I do not speak of what I cannot praise.

Daring ideas are like chessmen moved forward; they may be beaten, but they may start a winning game.

They teach in academies far too many things, and far too much that is useless.

If you wish to advance into the infinite, explore the finite in all directions.

The world runs on from one folly to another; and the man who, solely from regard to the opinion of others, and without any wish or necessity of his own, toils after gold, honour, or any other phantom, is no better than a fool.

How many years must a man do nothing, before he can at all know what is to be done and how to do it!