[kwhitefoot]

Einstein apparently once said that the big difference between him and less successful scientists was that he 'stayed with problems longer'.

[vram22]

And Edison, who I've heard (as a kid) [1] had said: Genius is 1% inspiration and 99% perspiration.

[1] When I was a kid, not him :) Parents and other elders used to quote it. A lot of truth to it.