I particularly find the quotes of Albert Einstein to be intelligent.
Some of my favorites, from this
http://rescomp.stanford.edu/~cheshire/E ... uotes.html nice list:
"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
"Imagination is more important than knowledge."
"I want to know God's thoughts; the rest are details."
"Reality is merely an illusion, albeit a very persistent one."
"The only real valuable thing is intuition."
"A person starts to live when he can live outside himself."
"Science without religion is lame. Religion without science is blind."
"Common sense is the collection of prejudices acquired by age eighteen."
"The only thing that interferes with my learning is my education."
"Peace cannot be kept by force. It can only be achieved by understanding."
"We can't solve problems by using the same kind of thinking we used when we created them."
"Education is what remains after one has forgotten everything he learned in school."
"The important thing is not to stop questioning. Curiosity has its own reason for existing."
"Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
"Whoever undertakes to set himself up as a judge of Truth and Knowledge is shipwrecked by the laughter of the gods."
"In order to form an immaculate member of a flock of sheep one must, above all, be a sheep."
"My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble mind."
"The release of atom power has changed everything except our way of thinking...the solution to this problem lies in the heart of mankind. If only I had known, I should have become a watchmaker."
"Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence."
"The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science. He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed."
"A man's ethical behavior should be based effectually on sympathy, education, and social ties; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death."
... the distinction between past, present, and future is only a stubbornly persistent illusion."
"A human being is a part of a whole, called by us _universe_, a part limited in time and space. He experiences himself, his thoughts and feelings as something separated from the rest... a kind of optical delusion of his consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty."
"Not everything that counts can be counted, and not everything that can be counted counts." (Sign hanging in Einstein's office at Princeton)