Confucius
If language is not correct, then what is said is not what is meant. If what is said is not what is meant, then what must be done remains undone. Morals and art will deteriorate. Justice goes astray. The people will stand about in helpless confusion. Hence there must be no arbitrariness is what is said. This matters above everything.
Voltaire
Anyone who can make you believe absurdities can make you commit atrocities.
Mark Twain
The difference between the almost right word and the right word is really a large matter -- it's the difference between the lightning bug and the lightning.