There's small Revenge in Words, but Words may be greatly revenged

Remember not only to say the right thing in the right place, but far more difficult still, to leave unsaid the wrong thing at the tempting moment.

It is better to take many injuries than to give one.

...it is prodigious the quantity of good that may be done by one man if he will make a business of it.

Take counsel in wine, but resolve afterwards in water.

Were the offer made true, I would engage to run again, from beginning to end, the same career of life. All I would ask should be the privilege of an author, to correct, in a second edition, certain errors of the first.

Tis a great confidence in a friend to tell him your faults; greater to tell him his.