"We must not infer from [the decline of religion] that rationalistic or scientific education has made any great progress in the lower classes. A person may not only question the truth of religious doctrines — he may also be convinced that all religions are historical phenomena born of innate and profound needs of the human spirit, and that attitude may be arrived at through a realistic mental training based on comprehensive studies that have gradually accustomed the mind not to accept as true anything that is not scientifically proved. In such a case, on losing one system of illusions, the individual is left so well balanced that he will not be inclined to embrace another, and certainly not the first that comes along. But the mass of lower-class unbelievers that we have in nations of European civilization today — and also, it must be confessed, the great majority of unbelievers who are not exactly lower-class, do not arrive at rationalism over any such road. They disbelieve, and they scoff, simply because they have grown up in environments in which they have been taught to disbelieve and to scoff. Under those circumstances, the mind that rejects Christianity because it is based on the supernatural is quite ready to accept other beliefs, and beliefs that may well be cruder and more vulgar. [...] Instead of believing blindly in the priest they believe blindly in the revolutionary agitator. They pride themselves on being in the vanguard of civilization, and their minds are open to all sorts of superstitions and sophistries. The moral and intellectual status which they have attained, far from being an enlightened positivism, is just a vulgar, sensuous, degrading materialism — it is “‘indifferentism,” if one prefers to call it that."