Who said “Be wiser than other people, if you can; but do not tell them so.”?

“For he who fights and runs away May live to fight another day; But he who is in battle slain Can never rise and fight again.”

“I cannot and do not live in the world of discretion, not as a writer, anyway. I would prefer to, I assure you -- it would make life easier. But discretion is, unfortunately, not for novelists.”

“Be advised what thou dost discourse of, and what thou maintainest whether touching religion, state, or vanity; for if thou err in the first, thou shalt be accounted profane; if in the second, dangerous; if in the third, indiscreet and foolish.”

“Never say ''oops'' in the operating room.”

“Depart from discretion when it interferes with duty.”

“Take the tone of the company you are in.”

“Let blockheads read what blockheads wrote.”

“Whatever is worth doing at all is worth doing well.”

“The less one has to do, the less time one finds to do it in.”

“Manners must adorn knowledge, and smooth its way through the world.”

“Speak of the moderns without contempt, and of the ancients without idolatry.”