The world is not yet exhausted: let me see something tomorrow which I never saw before.

Few of those who fill the world with books, have any pretensions to the hope either of pleasing or instructing. They have often no other task than to lay two books before them, out of which they compile a third, without any new material of their own, and with very little application of judgment to those which former authors have supplied.

Differences, we know, are never so effectually laid asleep as by some common calamity; an enemy unites all to whom he threatens danger.

Great works are performed, not by strength, but by perseverance. Those that walk with vigor, three hours a day, will pass in seven years a space equal to the circumference of the globe.

Exercise is labor without weariness.

The excellence of aphorisms consists not so much in the expression of some rare or abstruse sentiment, as in the comprehension of some useful truth in a few words.

A little knowledge is a dangerous thing - it only hastens fools to rush in where angels fear to tread.