"As for the forces, electromagnetism and gravity we experience in everyday life. But the weak and strong forces are beyond our ordinary experience. So in physics, lots of the basic building blocks take 20th- or perhaps 21st-century equipment to explore."
"Life can only be understood backwards but it must be lived forwards."Edward Witten on Soren Kierkegaard
"The only source of knowledge is experience."Edward Witten on Albert Einstein
"Experience: that most brutal of teachers. But you learn, my God do you learn."Edward Witten on C. S. Lewis
"Experience is simply the name we give our mistakes."Edward Witten on Oscar Wilde
"A man who carries a cat by the tail learns something he can learn in no other way."Edward Witten on Mark Twain
"But the beauty of Einstein's equations, for example, is just as real to anyone who's experienced it as the beauty of music. We've learned in the 20th century that the equations that work have inner harmony."
"One of the basic things about a string is that it can vibrate in many different shapes or forms, which gives music its beauty."