Quotes: Laconic Wiki

"Omit needless words."
Strunk & White, The Elements of Style

"Amplification is the vice of modern oratory. It is an insult to an assembly of reasonable men, disgusting and revolting instead of persuading. Speeches measured by the hour, die with the hour."

"Je n'ai fait celle-ci plus longue que parce que je n'ai pas eu le loisir de la faire plus courte."
(Translation: I have made this [letter] longer, because I have not had the time to make it shorter.)
Blaise Pascal, "Lettres provinciales", letter 16, 1657

""The secret of being a bore is to tell everything."
Voltaire

"Brevity is the soul of wit."
Polonius, "Hamlet", William Shakespeare (Actually used for Hypocritical Humor - guess how Polonius speaks?)

"Brevity is wit."
Unknown

"Talk: Excessive. Time: Limited."
Omega Supreme, Transformers Generation 1, "The Secret of Omega Supreme"

Eschew surplusage.
Mark Twain, "Fenimore Cooper's Literary Offenses"