"I remember often when we were both consulting for Thinking Machines in Boston, Feynman would say, “Let’s hide away and do some physics.” This was a typical scenario. Yes, I think we thought nobody was noticing that we were off at the back of a press conference about a new computer system talking about the nonlinear sigma model. Typically, Feynman would do some calculation. With me continually protesting that we should just go and use a computer. Eventually I’d do that. Then I’d get some results. And he’d get some results. And then we’d have an argument about whose intuition about the results was better."

I like how playful they are. 

Two great minds.

The inspiration for Mathmatica.