"Man's mind once stretched by a new idea, never regains its orginial dimensions." -- Oliver Wendell Holmes, Jr.
Prince Machiavelli on creating new order
“There is nothing more difficult to take in hand, more perilous to conduct, or uncertain in its success, than to take the lead in a new order of things.”
"Anarchism is founded on the observation that since few men are wise enough to rule themselves, even fewer are wise enough to rule others."
Tolstoy on Marriage - The "Ana Karenina Principle"
"All happy families resemble one another, each unhappy family is unhappy in its own way”
This is perhaps the most famous quote from Tolstoy. It is the first sentence in Anna Karenina. Jared Diamond used this quote in his book Guns, Germs and Steel to present the general principle about there are more ways for something not to work than to work and referred to is as the "Ana Karenina Principle."
John Stuart Mill on Stupidity and Conservatives
"Although it is true that not all conservatives are stupid, it is true that most stupid people are conservative."