George Bernard Shaw.

Despite being an advocate of Marxist Socialism, George Bernard Shaw made a few very good points in his time, many of these points about the linguistic trends that shape our world. Here are a few quotes that I've found enlightening in one way or another:

"The reasonable man adapts himself to the world. The unreasonable man persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man."

"Do not do unto others as you expect they should do unto you. Their tastes may not be the same."

"The fact that a believer is happier than a skeptic is no more to the point than the fact that a drunken man is happier than a sober one. The happiness of credulity is a cheap and dangerous quality."

"I learned long ago, never to wrestle with a pig. You get dirty, and besides, the pig likes it."

"No man ever believes that the Bible means what it says: He is always convinced that it says what he means."

"The secret of success is to offend the greatest number of people."