Everybody thinks himself so well supplied with common sense that even those most difficult to please. . . never desire more of it than they already have.

We call infinite that thing whose limits we have not perceived, and so by that word we do not signify what we understand about a thing, but rather what we do not understand.

... moral certainty is certainty which is sufficient to regulate our behaviour, or which measures up to the certainty we have on matters relating to the conduct of life which we never normally doubt, though we know that it is possible, absolutely speaking, that they may be false.

For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to instruct myself had no effect other than th eincreasing discovery of my own ignorance

Illusory joy is often worth more than genuine sorrow.

Nothing comes out of nothing.

In the matter of a difficult question it is more likely that the truth should have been discovered by the few than by the many.