The writers of the eighteenth century have doubtless rendered immense services to society; but their philosophy, based as it is upon sensualism, has never penetrated any deeper than the human epidermis. They have only considered the exterior universe; and so they have retarded, for some time, the moral development of man and the progress of science which will always draw its first principles from the Gospel, principles hereafter to be best understood by the fervent disciples of the Son of Man. The study of thought’s mysteries, the discovery of those organs which belong to the human soul, the geometry of its forces, the phenomena of its active power, the appreciation of the faculty by which we seem to have an independent power of bodily movement, so as to transport ourselves whither we will and to see without the aid of bodily organs, —in a word the laws of thought’s dynamic and those of its physical influence,—these things will fall to the lot of the next century, as their portion in the treasury of human sciences. And perhaps we, of the present time, are merely occupied in quarrying the enormous blocks which later on some mighty genius will employ in the building of a glorious edifice. Thus the error of Rousseau is simply the error of his age. He explains modesty by the relations of different human beings to each other instead of explaining it by the moral relations of each one with himself. Modesty is no more susceptible of analysis than conscience; and this perhaps is another way of saying that modesty is the conscience of the body; for while conscience directs our sentiments and the least movement of our thoughts towards the good, modesty presides over external movements. The actions which clash with our interests and thus disobey the laws of conscience wound us more than any other; and if they are repeated call forth our hatred. It is the same with acts which violate modesty in their relations to love, which is nothing but the expression of our whole sensibility. If extreme modesty is one of the conditions on which the reality of marriage is based, as we have tried to prove [See _Conjugal Catechism, Meditation IV._], it is evident that immodesty will destroy it. But this position, which would require long deductions for the acceptance of the physiologist, women generally apply, as it were, mechanically; for society, which exaggerates everything for the benefit of the exterior man, develops this sentiment of women from childhood, and around it are grouped almost every other sentiment. Moreover, the moment that this boundless veil, which takes away the natural brutality from the least gesture, is dragged down, woman disappears. Heart, mind, love, grace, all are in ruins. In a situation where the virginal innocence of a daughter of Tahiti is most brilliant, the European becomes detestable. In this lies the last weapon which a wife seizes, in order to escape from the sentiment which her husband still fosters towards her. She is powerful