The political artist clamours, like Archimedes, for a place outside the social world on which he can take his stand, in order to lever it off its hinges. But such a place does not exist; and the social world must continue to function during any reconstruction. This is the simple reason why we must reform its institutions little by little, until we have more experience in social engineering.
This leads us to the more important second point, to the irrationalism which is inherent in radicalism. In all matters, we can only learn by trial and error, by making mistakes and improvements; we can never rely on inspiration, although inspirations may be most valuable as long as they can be checked by experience. [ch. 9, 181]