There are two principles of established acceptance in morals; first, that self-interest is the mainspring of all of our actions, and secondly, that utility is the test of their value.

Nothing more completely baffles one who is full of trick and duplicity himself, than straight forward and simple integrity in another.

Mental pleasures never cloy; unlike those of the body, they are increased by reputation, approved by reflection, and strengthened by enjoyment.

No disorders have employed so many quacks, as those that have no cure; and no sciences have exercised so many quills, as those that have no certainty.

In cases of doubtful morality, it is usual to say is there any harm in doing this? This question may sometimes be best answered by asking ourselves another; is there any harm in letting it alone?

They that are loudest in their threats are the weakest in the execution of them. It is probable that he who is killed by lightning hears no noise; but the thunder-clap which follows, and which most alarms the ignorant, is the surest proof of their safety.

It is more easy to forgive the weak who have injured us than the powerful whom we have injured.