On imagination...

"From childhood upward, everything is done to make the minds of men and women conventional and sterile. And if, by misadventure, some spark of imagination remains, its unfortunate possessor is considered unsound and dangerous, worthy only of contempt in time of peace and of prison or a traitor's death in time of war. Yet such men are known to have been in the past the chief benefactors of mankind, and are the very men who receive most honor as soon as they are safely dead."

Bertrand Russell