[wsy]

I like a lot how G. B. Shaw phrased this insight: "The reasonable man adapts himself to the world. The unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man."

However, from the perspective of the reasonable man, things look differently: Only a small minority of 'unreasonable men' actually manage to change the world. So it is rational to be doubtful if someone's novel idea contradicts widely shared assumptions.