A man does not please long when he has only species of wit.

Thinkers think and doers do. But until the thinkers do and the doers think, progress will be just another word in the already overburdened vocabulary by sense.

It is necessary, in order to know things well, to know the particulars of them; and these, being infinite, make our knowledge eversuperficial and imperfect.

Novelty is to love like bloom to fruit; it gives a luster which is easily effaced, but never returns.

Nature has concealed at the bottom of our minds talents and abilities of which we are not aware.

It is the prerogative of great men only to have great defects.

In growing old, we become more foolish - and more wise.