“No, this trick won't work... How on earth are you ever going to explain in terms of chemistry and physics so important a biological phenomenon as first love? ”

“Gravitation cannot be held responsible for people falling in love. How on earth can you explain in terms of chemistry and physics so important a biological phenomenon as first love? Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.”

“Generations to come will scarce believe that such a one as this ever in flesh and blood walked upon this earth. (said of Mahatma Gandhi)”

“In the matter of physics, the first lessons should contain nothing but what is experimental and interesting to see. A pretty experiment is in itself often more valuable than twenty formulae extracted from our minds.”

“If you can't explain it to a six year old, you don't understand it yourself.”

“You do not really understand something unless you can explain it to your grandmother.”

“On the occasion of Mahatma Gandhi's 70th birthday. "Generations to come, it may well be, will scarce believe that such a man as this one ever in flesh and blood walked upon this Earth.”