Wisdom.

“How incessant and great are the ills with which a prolonged old age is replete.”

“In a good bookroom you feel in some mysterious way that you are absorbing the wisdom contained in all the books through your skin, without even opening them.”

“A good idea is an orphan without effective communication.”

“Nothing can dim the light which shines from within.”

“That which is valuable is pure, properly aligned, and glitters with light — and this is true for the person just as it is for the gem.”

“We must interpret a bad temper as a sign of inferiority.”

“People never lie so much as after a hunt, during a war or before an election.”

“Government always finds a need for whatever money it gets.”

“Strong and bitter words indicate a weak cause.”

“The secret to humor is surprise.”

“The very ink with which history is written is merely fluid prejudice.”

“A person with a new idea is a crank until the idea succeeds.”

“I do not recall a Jewish home without a book on the table.”

“If we find ourselves with a desire that nothing in this world can satisfy, the most probable explanation is that we were made for another world.”

“The measure of who we are is what we do with what we have.”

“Don't let schooling interfere with your education.”

“Government is like a baby. An alimentary canal with a big appetite at one end and no sense of responsibility at the other.”

“In our age there is no such thing as 'keeping out of politics.' All issues are political issues, and politics itself is a mass of lies, evasions, folly, hatred and schizophrenia.”

“The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'”

“To read without reflecting is like eating without digesting.”

“I have never let my schooling interfere with my education.”

“Let no one ever come to you without leaving better and happier.”

“Natural ability without education has more often raised a man to glory and virtue than education without natural ability.”

“When humor goes, there goes civilization.”

“If people like you, they'll listen to you, but if they trust you, they'll do business with you.”

“Genius without education is like silver in the mine.”

“A marriage without conflicts is almost as inconceivable as a nation without crises.”

“With self-discipline most anything is possible.”

“True dignity is never gained by place, and never lost when honors are withdrawn.”

“Whenever the people are well-informed, they can be trusted with their own government.”

“No one can make you feel inferior without your consent.”

“I don't make jokes. I just watch the government and report the facts.”

“Everything is funny, as long as it's happening to somebody else.”

“Isn't it funny how day by day nothing changes but when you look back everything is different?.”

“All are not cooks that walk with long knives.”

“Better be without money than without honor.”

“Nobody can hurt me without my permission.”

“What lies behind us and what lies before us are tiny matters compared to what lies within us.”

“Without education, we are in a horrible and deadly danger of taking educated people seriously.”