Our sojourn upon earth is then only a kind of trial, imposed upon us by nature, during which we must refine our souls, free them from earthly bonds, rid them of the defects which weigh them down, and hinder them from rising, in radiance, towards the ethereal spheres. Every ill-fulfilled human existence has to be recommenced. Thus, the school-boy who has worked hard, who has studied well, goes into a higher class at the end of the year; but if he has made no progress in his studies, he must go through his class again. Perverse men are, in our opinion, vicious beings who have had a previous life, and are obliged to live it over again. They must go through it again and again, until the day comes when their souls shall be fit to take higher rank in the hierarchy of creatures, that is to say, until they shall be fit to pass, after their death, into the condition of superhuman beings. In proportion as the cause of our existence here below is obscure and even inexplicable according to ordinary ideas, it is simple and luminous in the light of the doctrine of the plurality of existences. We must add that this doctrine is conformable to the justice of God. In making earthly life a trial for man, God is equitable and good, like an earthly father. Is it not better to subject a soul to a trial which may begin over again if it have an unfortunate result, than to bind it to one condition, failure in which must involve the condemnation of the guilty person? It is better to offer the possibility of rehabilitation by his own efforts, by his personal struggles, to a fallen creature, than to utterly crush him, stained by his crimes and imperfections. The justice and the goodness of God are manifest in this paternal arrangement, much more than in the severe jurisdiction which would irretrievably condemn a soul after one single trial had resulted unfavourably.