It's very satisfying to take ...

It's very satisfying to take a problem we thought difficult and find a simple solution. The best solutions are always simple.
 Ivan Sutherland

Quotes from the same author

It's not the school, the curriculum, or the teacher, but motivation that is the single most important ingredient in learning.
 Ivan Sutherland
The screen is a window through which one sees a virtual world. The challenge is to make that world look real, act real, sound real, feel real.
 Ivan Sutherland