To believe with certainty, we must begin with doubting.

How many persons fancy they have experience simply because they have grown old!

There are few persons of greater worth than their reputation; but how many are there whose worth is far short of their reputation!

Science when well-digested is nothing but good sense and reason.

Those who ought to be secure from calumny are generally those who avoid it least.

Nothing but religion is capable of changing pains into pleasures.

To believe with certainty, we must begin with doubting.