Ethical ideals deviate from the actual in three ways. In the first place, there is often in actual willing and doing something directly opposed to the principle of welfare. In this case, the office of Ethics is to restrain and forbid. To this function corresponds, in the practical life of the will, the hemming by which involuntary, original, or acquired impulses and inclinations are repressed. Again, actual willing and doing often exhibit only a weak and imperfect realization of that which Ethics demands. Here there must be an increase in the degree as well as in the extent of the realization. To this corresponds, in the practical life of the will, effort and attention, the power of the will, through its influence upon conceptions and feelings, to react upon itself. And finally, there may be, in willing and doing, a lack of unity and harmony; various opposed tendencies and impulses may make themselves felt. Here a process of harmonizing and concentration is necessary. And to this corresponds, in the practical life of the will, a drilling in connected action and trains of thought, and in the power to make an end of reflection by decision. In all three cases, the principle of welfare is to be followed; and the three processes are to be applied not only in the development of the individual but also in that of societies, and of the species. That which manifests itself in conscience is a species-instinct. In the feeling of judgment, the relation between central and peripheral factors finds expression, neither of which, and least of all the central factors, are developed by individual experience, but both of which are, on the contrary, the product of the experience of the species. What Kant called the Categorical Imperative is, in fact, an instinct; and every instinct speaks unconditionally, categorically, gives no reasons and admits of no excuse. No instinct finds expression without the existence of conditions which call it forth; but all manner of individual and social circumstances may furnish such conditions. When conscience begins to be conscious of its office, it manifests itself as an Impulse.[77] The thought of actions which the instinctive judgment has recognized, or to the performance of which it has perhaps incited, is combined with pleasure, the conception of actions of the opposite nature with pain. The tendency arises to linger with the former and to repeat them, and to turn from the latter, if no stronger impulses of another sort make themselves felt.