We shall, I think, appreciate his real position better by considering his approximation to the theory which, as we know, was suggested to Darwin by a perusal of Malthus.[237] There is a closer resemblance than appears at first. The first edition concludes by two chapters afterwards omitted, giving the philosophical application of his theory. He there says that the 'world is a mighty process of God not for the trial but for the creation and formation of the mind.'[238] It is not, as Butler thought, a place of 'probation,' but a scene in which the higher qualities are gradually developed. Godwin had quoted Franklin's view that 'mind' would become 'omnipotent over matter.' Malthus holds that, as he puts it, 'God is making matter into mind.' The difference is that Malthus regards evil in general not as a sort of accident of which we can get rid by reason; but as the essential stimulus which becomes the efficient cause of intellectual activity. The evils from which men suffer raise savage tribes from their indolence, and by degrees give rise to the growth of civilisation. The argument, though these chapters were dropped by Malthus, was taken up by J. B. Sumner, to whom he refers in later editions.[239] It is, in fact, an imperfect way of stating a theory of evolution. This appears in his opening chapters upon the 'moral restraint.'[240] He explains that moral and physical evils are 'instruments employed by the Deity' to admonish us against such conduct as is destructive of happiness. Diseases are indications that we have broken a law of nature. The plague of London was properly interpreted by our ancestors as a hint to improve the sanitary conditions of the town. Similarly, we have to consider the consequences of obeying our instincts. The desire of food and necessaries is the most powerful of these instincts, and next to it the passion between the sexes. They are both good, for they are both natural; but they have to be properly correlated. To 'virtuous love' in particular we owe the 'sunny spots' in our lives, where the imagination loves to bask. Desire of necessaries gives us the stimulus of the comfortable fireside; and love adds the wife and children, without whom the fireside would lose half its charm. Now, as a rule, the sexual passion is apt to be in excess. The final cause of this excess is itself obvious. We cannot but conceive that it is an object of 'the Creator that the earth should be replenished.'[241] To secure that object, it is necessary that 'there should be a tendency in the population to increase faster than food.' If the two instincts were differently balanced, men would be content though the population of a fertile region were limited to the most trifling numbers. Hence the instinct has mercifully been made so powerful as to stimulate population, and thus indirectly and eventually to produce a population at once larger and more comfortable. On the one hand, it is of the