Interest and Motive are interchangeable ideas; what is interest but quod mea interest, that which is of importance to me? And is not this, in one word, whatever stirs and sets in motion my Will? Consequently, what is an interest other than the working of a motive upon the Will? Therefore where a motive moves the Will, there the latter has an interest; but where the Will is affected by no motive, there in truth it can be as little active, as a stone is able to leave its place without being pushed or pulled. No educated person will require any demonstration of this. It follows that every action, inasmuch as it necessarily must have a motive, necessarily also presupposes an interest.

Kaut, however, propounds a second entirely new class of actions which are performed without any interest, i.e., without motive.