We must not only obtain Wisdom: we must enjoy her.

Not in opinion but in nature is law founded.

Through doubt we arrive at the truth.

There is nothing which wings its flight so swiftly as calumny, nothing is uttered with more ease; nothing is listened to with more readiness, nothing disbursed more widely.

No well-informed person has declared a change of opinion to be inconstancy.

Virtue is increased by the smile of approval; and the love of renown is the greatest incentive to honourable acts.

Whatever is done without ostentation, and without the people being witnesses of it, is, in my opinion, most praiseworthy: not that the public eye should be entirely avoided, for good actions desire to be placed in the light; but notwithstanding this, the greatest theater for virtue is conscience.