And the degree of importance, both of the feelings transmitted by art and of the information transmitted by science, is decided by the religious perception of the given time and society, _i.e._ by the common understanding of the purpose of their lives possessed by the people of that time or society. That which most of all contributes to the fulfilment of that purpose will be studied most; that which contributes less will be studied less; that which does not contribute at all to the fulfilment of the purpose of human life will be entirely neglected, or, if studied, such study will not be accounted science. So it always has been, and so it should be now; for such is the nature of human knowledge and of human life. But the science of the upper classes of our time, which not only does not acknowledge any religion, but considers every religion to be mere superstition, could not and cannot make such distinctions. Scientists of our day affirm that they study _everything_ impartially; but as everything is too much (is in fact an infinite number of objects), and as it is impossible to study all alike, this is only said in the theory, while in practice not everything is studied, and study is applied far from impartially, only that being studied which, on the one hand, is most wanted by, and on the other hand, is pleasantest to those people who occupy themselves with science. And what the people, belonging to the upper classes, who are occupying themselves with science most want is the maintenance of the system under which those classes retain their privileges; and what is pleasantest are such things as satisfy idle curiosity, do not demand great mental efforts, and can be practically applied. And therefore one side of science, including theology and philosophy adapted to the existing order, as also history and political economy of the same sort, are chiefly occupied in proving that the existing order is the very one which ought to exist; that it has come into existence and continues to exist by the operation of immutable laws not amenable to human will, and that all efforts to change it are therefore harmful and wrong. The other part, experimental science,—including mathematics, astronomy, chemistry, physics, botany, and all the natural sciences,—is exclusively occupied with things that have no direct relation to human life: with what is curious, and with things of which practical application advantageous to people of the upper classes can be made. And to justify that selection of objects of study which (in conformity to their own position) the men of science of our times have made, they have devised a theory of science for science’s sake, quite similar to the theory of art for art’s sake. As by the theory of art for art’s sake it appears that occupation with all those things that please us—is art, so, by the theory of science for science’s sake, the study of that which interests us—is science.