And thus, because of the time, the place, the audience, and the subject, we are from the start brought face to face with a serious question,--a question which has often been debated, and which in the last few years, on account of the exasperation of national sentiment brought about by the World War, has become the object of passionate controversies. For if it has been frequently argued on one side that science is by nature and ought to be national, there has been no lack of warning from the other side as to the dangers of this position. For war, it was said, would, sooner or later, come to an end and be a thing of the past; whereas truth never sets, never becomes a thing of the past; it is error alone that is destined to pass and disappear. We were reminded of the fact that what is scientifically true and artistically beautiful is beautiful and true beyond no less than within the national frontier; and that only on this condition is it worthy of its name. This question therefore presents itself as a preliminary to our investigation, and it is for us to examine it. We shall do so in as brief a manner as the subject will allow. We shall first point out the inutility of distinguishing science from culture, education from instruction. Those who insist on these distinctions maintain that though a school is never national in virtue of the content of its scientific teaching, it must nevertheless be national in that it transforms science into culture, makes it over into an instrument with which to shape consciousness and conscience, and uses it as a tool for the making of men and for the training of citizens. Thus we have as an integral part of science a form of action directed on the character and the will of the young generations that are being nurtured and raised in accordance with national traditions and in view of the ends which the state wants to attain. Such distinctions however complicate but do not resolve the controversy. They entangle it with other questions which it were better to leave untouched at this juncture. For it might be said of questions what Manzoni said of books: one at a time is enough--if it isn't too much.