Here are a handful from Einstein:
"Reality is merely an illusion, albeit a very persistent one."
"Science without religion is lame. Religion without science is blind."
"Everything should be made as simple as possible, but not simpler."
"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."
"Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
"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."
"Not everything that counts can be counted, and not everything that can be counted counts."
For more: http://rescomp.stanford.edu/~cheshire/E ... uotes.html
Oh, and my favorite from Dr. King: "No one is free while others are oppressed."
Sotthī hontu nirantaraṃ - May you forever be well.