Richard Brinsley Sheridan said this quote

Never say more than is necessary.

~ Richard Brinsley Sheridan

The right honorable gentleman is indebted to his memory for his jests, and to his imagination for his facts.

~ Richard Brinsley Sheridan

Egad, I think the interpreter is the hardest to be understood of the two!

~ Richard Brinsley Sheridan

SNEER. But, what the deuce, is the confidante to be mad too?PUFF. To be sure she is. The confidante is always to do whatever her mistress does- weep when she weeps, smile when she smiles, go mad when she goes mad.-Now, Madam Confidante! But keep your madness in the background, if you please.

~ Richard Brinsley Sheridan