We must, say the believers, study the three persons of the Trinity; we must know the nature of each of these persons, and what sacraments we ought or ought not to perform, for our salvation depends, not on our own efforts, but on the Trinity and the regular performance of the sacraments. We must, say the sceptics, know the laws by which this infinitesimal particle of matter was evolved in infinite space and infinite time; but it is absurd to believe that by reason alone we can secure true well-being, because the amelioration of man's condition does not depend upon man himself, but upon the laws that we are trying to discover. I firmly believe that, a few centuries hence, the history of what we call the scientific activity of this age will be a prolific subject for the hilarity and pity of future generations. For a number of centuries, they will say, the scholars of the western portion of a great continent were the victims of epidemic insanity; they imagined themselves to be the possessors of a life of eternal beatitude, and they busied themselves with divers lucubrations in which they sought to determine in what way this life could be realized, without doing anything themselves, or even concerning themselves with what they ought to do to ameliorate the life which they already had. And what to the future historian will seem much more melancholy, it will be found that this group of men had once had a master who had taught them a number of simple and clear rules, pointing out what they must do to render their lives happy,--and that the words of this master had been construed by some to mean that he would come on a cloud to re-organize human society, and by others as admirable doctrine, but impracticable, since human life was not what they conceived it to be, and consequently was not worthy of consideration; as to human reason, it must concern itself with the study of the laws of an imaginary existence, without concerning itself about the welfare of the individual man. The Church says that the doctrine of Jesus cannot be literally practised here on earth, because this earthly life is naturally evil, since it is only a shadow of the true life. The best way of living is to scorn this earthly existence, to be guided by faith (that is, by imagination) in a happy and eternal life to come, and to continue to live a bad life here and to pray to the good God. Philosophy, science, and public opinion all say that the doctrine of Jesus is not applicable to human life as it now is, because the life of man does not depend upon the light of reason, but upon general laws; hence it is useless to try to live absolutely conformable to reason; we must live as we can with the firm conviction that according to the laws of historical and sociological progress, after having lived very imperfectly for a very long time, we shall suddenly find that our lives have become very good.