“In the long run of history, the censor and the inquisitor have always lost. The only sure weapon against bad ideas is better ideas.”

“Books and ideas are the most effective weapons against intolerance and ignorance.”

“It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.”

“In this time of the great struggle for a new art we fight like disorganized 'savages' against an old, established power. The battle seems to be unequal, but spiritual matters are never decided by numbers, only by the power of ideas. The dreaded weapons of the 'savages' are their new ideas. New ideas kill better than steel and destroy what was thought to be indestructible.”

“The dreadful truth is that when people come to see their MP, they have run out of better ideas.”

“The only sure way to avoid making mistakes is to have no new ideas.”

“You may turn a bad idea into a good idea — don't kill the bad idea prematurely. A bad idea can evolve into a good idea.”

“I have always liked the idea of Superman because I have always liked the idea that there is one person in the world who doesn’t do bad things. And that there is one person in the world who is able to fly.”

“It's not that I don't know that it's a bad idea. It's that, lately, bad ideas have a particular hold over me.”

“It is a bad idea to live too long. Few carry it off well.”