This is in particular clearly the case in the idea of duty, the elucidation of the inner meaning of which is Kant's greatest and most enduring service. A duty is always a command; it presents itself as independent of all caprice. At the same time, however, it can never be forced upon us by an external power; it needs our own assent and acknowledgment. Our own volition and being must operate in it, and, in this, being must present itself otherwise than it appears to be at the first glance. We must bear and maintain within us a new world; in submission to its orders we must assert and develop ourselves. In this manner alone can we explain the joyfulness which accompanies all genuine performance of duty, and without which duty is no more than a task forced upon us. How much power duty, and the norms in general, may acquire in the greater part of human life is a question in itself; but they could not exist for us even as ideas and possibilities if they were not in some way based in our own being. However, as they show this being in a new light, it follows that they must themselves gain in clearness and in power and become more closely unified if they are understood and treated as developments and modes of self-preservation of our own life. It is with regard to content as well as to form that beginnings of a new life appear. At the level of nature only that which serves the self-preservation and the advancement of the life of the individual being is estimated as a good; all that is involved in this may be comprehended under the conception of utility. But notwithstanding its great power over man the consideration of utility does not form the only motive of his life. For a detailed treatment of this matter we may refer to what was said in the discussion of "The Growth of Man beyond Nature." At present we are concerned especially with the view that the new that appears in us should be acknowledged to be the manifestation of a new world and the expression of our real being. In the growing of man beyond nature negation usually preponderates; he must limit the impulses of his natural _ego_, acknowledge and respect the rights of others, be ready to subordinate and sacrifice himself. It is for the most part not evident what can commend such a negation to him and give it power over him; and an impulse aroused to clear consciousness and strong desire may, therefore, feel this entire connection with a new world to be an unwarrantable limitation, and reject it as a violent intimidation and a degradation of life. The matter is seen in its right light only when negation is regarded as the reverse side of affirmation, and even then only if the winning of a new life and being is acknowledged in this affirmation. The positive impulse of self-preservation is indispensable to complete vital-energy, but mere self-assertion on the part of an individual in opposition to others does not constitute a genuine self; a