Wisdom.

“Be careful about reading health books. You may die of a misprint.”

“A clever person solves a problem. A wise person avoids it.”

“By denying scientific principles, one may maintain any paradox.”

“Change in all things is sweet.”

“Quality is not an act, it is a habit.”

“Government, even in its best state, is but a necessary evil; in its worst state, an intolerable one.”

“Necessity is the mother of taking chances.”

“I don't build in order to have clients. I have clients in order to build.”

“Suppose you were an idiot, and suppose you were a member of Congress; but I repeat myself.”

“Noble deeds that are concealed are most esteemed.”

“Honesty is the first chapter in the book of wisdom.”

“Whatever you are, be a good one.”

“I didn't attend the funeral, but I sent a nice letter saying I approved of it.”

“The government is us; we are the government, you and I.”

“The measure of intelligence is the ability to change.”

“Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves.”

“The problem is not that people are taxed too little, the problem is that government spends too much.”

“In the middle of difficulty lies opportunity”

“When angry count to ten before you speak. If very angry, count to one hundred.”

“It has been said that politics is the second oldest profession. I have learned that it bears a striking resemblance to the first.”

“Bashfulness is an ornament to youth, but a reproach to old age.”

“The world is a book, and those who do not travel read only a page.”

“The most terrifying words in the English language are: I'm from the government and I'm here to help.”

“Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.”

“She got her looks from her father. He's a plastic surgeon.”

“It is better to deserve honors and not have them than to have them and not deserve them.”

“Inflation is as violent as a mugger, as frightening as an armed robber and as deadly as a hit man.”

“Blindest is he who doesn't want to see.”

“I find that the harder I work, the more luck I seem to have.”

“Let there be work, bread, water and salt for all.”

“Education: the path from cocky ignorance to miserable uncertainty.”

“Anger cannot be dishonest.”

“Government 'help' to business is just as disastrous as government persecution... the only way a government can be of service to national prosperity is by keeping its hands off.”

“Anger dwells only in the bosom of fools.”

“Don't find fault, find a remedy.”

“Keep your eyes on the stars, and your feet on the ground.”

“Only he who wanders, finds new paths.”

“Beauty in distress is much the most affecting beauty.”

“In any investment, you expect to have fun and make money.”

“Be yourself; everyone else is already taken.”

“If there is anything that a man can do well, I say let him do it. Give him a chance.”

“Reject your sense of injury and the injury itself disappears.”

“A building has integrity just like a man. And just as seldom.”