The same thing happens with these empirical practical concepts as with all the other empirical concepts, of which we have spoken in general. They have been stiffened into philosophical concepts, for the hasty satisfaction of the philosophical need of man. Hence, among others, many of the disputes as to the principle of the Philosophy of the practical. Some indeed maintain that such a principle is to be found in _duty or the imperative; others in the idea or the ideal, others in the joy of good, others in the abhorrence of pain, others in virtue, others in enthusiasm,_ and so on. Each of the above-mentioned theoreticians has the sharpest eyes for the discovery of the defects in the theories of others, but is short-sighted as regards his own. Those who maintain the ideal satirize the form of the categoric imperative as suggestive of police or _gendarmerie;_ those of the imperative and of duty deride the quietist form and the insipid ecstasy proper to the contemplation of ideals; those of the avoidance of pain do not spare their sarcasms for the hunters of joy; those of joy call these plunged in sorrow hypocrites, who also obtain enjoyments for themselves, if in no other way, then secretly: _si non caste, caute._ The truth is that all are wrong as philosophers, because they all find the principle of the will, not in itself but in an empirical concept, which gives to it an abstract and mutilated appearance. And, on the other hand, all are right, because those aspects are all real, and in each one of them the others can be implicitly shown. The categoric imperative, for instance, contains in itself both the will, which, in so far as it commands itself, is the true will, the joy of being and the sorrow of not being what we wish to be, the ideal, and the necessity of self-realization, and so of entering into strife against irreality, thus becoming imperative, and so on. [Sidenote: _Its characteristics._]