We have seen in III.
that it stands in antagonism to all mere particulars; but here it stands in antagonism to all mere individual interests as so many selves, to the personal will as seeking its objects in the manifestation of itself for itself--'sit pro ratione voluntas';--whether this be realized with adjuncts, as in the lust of the flesh, and in the lust of the eye; or without adjuncts, as in the thirst and pride of power, despotism, egoistic ambition.

The fourth antagonist, then, of reason is the lust of the will.
Corollary.

Unlike a million of tigers, a million of men is very different from a million times one man.

Each man in a numerous society is not only coexistent with, but virtually organized into, the multitude of which he is an integral part.

His 'idem' is modified by the 'alter'.
And there arise impulses and objects from this 'synthesis' of the 'alter et idem', myself and my neighbour.