But such a man is not pronounced a genius.

If his ravings about this and that are harmless, we smile and let him talk; but if his lack of judgment extend to things of grave import, or be accompanied by equal illusions regarding himself and society in other relationships, then we classify his case and put him into the proper ward for the insane.
Two of the commonest forms of such impairment of judgment are seen in the victims of "fixed ideas" on the one hand, and the _exaltes_ on the other.

These men have no true sense of values, no way of selecting the fit combinations of imagination from the unfit; and even though some transcendently true and original thought were to flit through the diseased mind of such a one, it would go as it came, and the world would wait for a man with a sense of fitness to arise and rediscover it.

The other class, the _exaltes_, are somewhat the reverse; the illusion of personal greatness is so strong that their thoughts seem to them infallible and their persons divine.
Men of such perversions of judgment are common among us.

We all know the man who seems to be full of rich and varied thought, who holds us sometimes by the power of his conceptions or the beauty of his creations, but in whose thought we yet find some incongruity, some eminently unfit element, some grotesque application, some elevation or depression from the level of commonplace truth, some ugly strain in the aesthetic impression.