I think we have sufficiently paved the way for the answer to both these questions. It will be found if we fix our attention on the psychical origin of religious ideas. These, which profess to be dogmas, are not the residue of experience or the final result of reflection; they are illusions, fulfilments of the oldest, strongest and most insistent wishes of mankind; the secret of their strength is the strength of these wishes. We know already that the terrifying effect of infantile helplessness aroused the need for protection—protection through love—which the father relieved, and that the discovery that this helplessness would continue through the whole of life made it necessary to cling to the existence of a father—but this time a more powerful one. Thus the benevolent rule of divine providence allays our anxiety in face of life’s dangers, the establishment of a moral world order ensures the fulfilment of the demands of justice, which within human culture have so often remained unfulfilled, and the prolongation of earthly existence by a future life provides in addition the local and temporal setting for these wish-fulfilments. Answers to the questions that tempt human curiosity, such as the origin of the universe and the relation between the body and the soul, are developed in accordance with the underlying assumptions of this system; it betokens a tremendous relief for the individual psyche if it is released from the conflicts of childhood arising out of the father complex, which are never wholly overcome, and if these conflicts are afforded a universally accepted solution.
When I say that they are illusions, I must define the meaning of the word. An illusion is not the same as an error, it is indeed not necessarily an error. Aristotle’s belief that vermin are evolved out of dung, to which ignorant people still cling, was an error; so was the belief of a former generation of doctors that _tabes dorsalis_ was the result of sexual excess. It would be improper to call these errors illusions. On the other hand, it was an illusion on the part of Columbus that he had discovered a new sea-route to India. The part played by his wish in this error is very clear. One may describe as an illusion the statement of certain nationalists that the Indo-Germanic race is the only one capable of culture, or the belief, which only psycho-analysis destroyed, that the child is a being without sexuality. It is characteristic of the illusion that it is derived from men’s wishes; in this respect it approaches the psychiatric delusion, but it is to be distinguished from this, quite apart from the more complicated structure of the latter. In the delusion we emphasize as essential the conflict with reality; the illusion need not be necessarily false, that is to say, unrealizable or incompatible with reality. For instance, a poor girl may have an illusion that a prince will come and fetch her home. It is possible; some such cases have occurred. That the Messiah will come and found a golden age is much less probable; according to one’s personal attitude one will classify this belief as an illusion or as analogous to a delusion. Examples of illusions that have come true are not easy to discover, but the illusion of the alchemists that all metals can be turned into gold may prove to be one. The desire to have lots of gold, as much gold as possible, has been considerably damped by our modern insight into the nature of wealth, yet chemistry no longer considers a transmutation of metals into gold as impossible. Thus we call a belief an illusion when wish-fulfilment is a prominent factor in its motivation, while disregarding its relations to reality, just as the illusion itself does.
If after this survey we turn again to religious doctrines, we may reiterate that they are all illusions, they do not admit of proof, and no one can be compelled to consider them as true or to believe in them. Some of them are so improbable, so very incompatible with everything we have laboriously discovered about the reality of the world, that we may compare them—taking adequately into account the psychological differences—to delusions. Of the reality value of most of them we cannot judge; just as they cannot be proved, neither can they be refuted. We still know too little to approach them critically. The riddles of the universe only reveal themselves slowly to our enquiry, to many questions science can as yet give no answer; but scientific work is our only way to the knowledge of external reality. Again, it is merely illusion to expect anything from intuition or trance; they can give us nothing but particulars, which are difficult to interpret, about our own mental life, never information about the questions that are so lightly answered by the doctrines of religion. It would be wanton to let one’s own arbitrary action fill the gap, and according to one’s personal estimate declare this or that part of the religious system to be more or less acceptable. These questions are too momentous for that; too sacred, one might say.
At this point it may be objected: well, then, if even the crabbed sceptics admit that the statements of religion cannot be confuted by reason, why should not I believe in them, since they have so much on their side—tradition, the concurrence of mankind, and all the consolation they yield? Yes, why not? Just as no one can be forced into belief, so no one can be forced into unbelief. But do not deceive yourself into thinking that with such arguments you are following the path of correct reasoning. If ever there was a case of facile argument, this is one. Ignorance is ignorance; no right to believe anything is derived from it. No reasonable man will behave so frivolously in other matters or rest content with such feeble grounds for his opinions or for the attitude he adopts; it is only in the highest and holiest things that he allows this. In reality these are only attempts to delude oneself or other people into the belief that one still holds fast to religion, when one has long cut oneself loose from it. Where questions of religion are concerned people are guilty of every possible kind of insincerity and intellectual misdemeanour. Philosophers stretch the meaning of words until they retain scarcely anything of their original sense; by calling ‘God’ some vague abstraction which they have created for themselves, they pose as deists, as believers, before the world; they may even pride themselves on having attained a higher and purer idea of God, although their God is nothing but an insubstantial shadow and no longer the mighty personality of religious doctrine. Critics persist in calling ‘deeply religious’ a person who confesses to a sense of man’s insignificance and impotence in face of the universe, although it is not this feeling that constitutes the essence of religious emotion, but rather the next step, the reaction to it, which seeks a remedy against this feeling. He who goes no further, he who humbly acquiesces in the insignificant part man plays in the universe, is, on the contrary, irreligious in the truest sense of the word.
It does not lie within the scope of this enquiry to estimate the value of religious doctrines as truth. It suffices that we have recognized them, psychologically considered, as illusions. But we need not conceal the fact that this discovery strongly influences our attitude to what must appear to many the most important of questions. We know approximately at what periods and by what sort of men religious doctrines were formed. If we now learn from what motives this happened, our attitude to the problem of religion will suffer an appreciable change. We say to ourselves: it would indeed be very nice if there were a God, who was both creator of the world and a benevolent providence, if there were a moral world order and a future life, but at the same time it is very odd that this is all just as we should wish it ourselves. And it would be still odder if our poor, ignorant, enslaved ancestors had succeeded in solving all these difficult riddles of the universe.