The man himself does not know it, and that is the reason he includes it.

His sense of fitness is dwarfed or paralyzed.

We in the community come to regret that he is so "visionary," with all his talent; so we accommodate ourselves to his unfruitfulness, and at the best only expect an occasional hour's entertainment under the spell of his presence.

This certainly is not the man to produce a world movement.
Most of the men we call "cranks" are of this type.

They are essentially lacking in judgment, and the popular estimate of them is exactly right.
It is evident, therefore, from this last explanation, that there is a second direction of variation among men: _variation in their sense of the truth and value of their own thoughts_, and with them of the thoughts of others.