Of course, we positivists know very well, that the material requirements of life shape and determine also the moral and intellectual aims of human consciousness. But positive science declares the following to be the indispensable requirement for the regeneration of human ideals: Without an ideal, neither an individual nor a collectivity can live, without it humanity is dead or dying. For it is the fire of an ideal which renders the life of each one of us possible, useful and fertile. And only by its help can each one of us, in the more or less short course of his or her existence, leave behind traces for the benefit of fellow-beings. The invitation extended to me proves that the students of Naples believe in the inspiring existence of such an ideal of science, and are anxious to learn more about ideas, with which the entire world of the present day is occupied, and whose life-giving breath enters even through the windows of the dry courtrooms, when their doors are closed against it.