its own existence; while apprehensive princes try to raise it up by an artificial stimulant, as the doctor tries to revive a dying man by the aid of a drug. There is a passage from Condorcet's _Des Progrès de l'esprit humain_, which seems to have been written as a warning to our epoch: _Le zèle religieux des philosophes et des grands n'était qu'une dévotion politique: et toute religion, qu'on se permet de défendre comme une croyance qu'il est utile de laisser au peuple, ne peut plus espérer qu'une agonie plus ou moins prolongée_. In the whole course of the events which I have pointed out you may always observe that belief and knowledge bear the same relation to each other as the two scales of a balance: when the one rises the other must fall. The balance is so sensitive that it indicates momentary influences. For example, in the beginning of this century the predatory excursions of French robbers under their leader Buonaparte, and the great efforts that were requisite to drive them out and to punish them, had led to a temporary neglect of science, and in consequence to a certain decrease in the general propagation of knowledge; the Church immediately began to raise her head again and Faith to be revived, a revival partly of a poetical nature, in keeping with the spirit of the times. On the other hand, in the more than thirty years' peace that followed, leisure and prosperity promoted the building up of science and the spread of knowledge in an exceptional degree, so that the result was what I have said, the dissolution and threatened fall of religion. Perhaps the time which has been so often predicted is not far distant, when religion will depart from European humanity, like a nurse whose care the child has outgrown; it is now placed in the hands of a tutor for instruction. For without doubt doctrines of belief that are based only on authority, miracles, and revelation are only of use and suitable to the childhood of humanity. That a race, which all physical and historical data confirm as having been in existence only about a hundred times the life of a man sixty years old, is still in its first childhood is a fact that every one will admit.