The surest way to tame a prisoner is to let him believe he’s free.
I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.
I never know what I think about something until I read what I've written on it.