It is still an unending source of surprise for me how a few scribbles on a blackboard or on a piece of paper can change the course of human affairs.
Stanislaw UlamHe [John von Neumann] had the invaluable faculty of being able to take the most difficult problem and separate it into its components, whereupon everything looked brlliantly simple.
Stanislaw UlamKnowing what is big and what is small is more important than being able to solve partial differential equations.
Stanislaw Ulam