No, our science is no illusion. But an illusion it would be to suppose that what science cannot give us we can get elsewhere. - Sigmund Freud

Thus I must contradict you when you go on to argue that men are completely unable to do without the consolation of the religious illusion, that without it they could not bear the troubles of life and the cruelties of reality. That is true, certainly, of the men into whom you have instilled the sweet — or bitter-sweet — poison from childhood onwards. But what of the other men, who have been sensibly brought up? Perhaps those who do not suffer from the neurosis will need no intoxicant to deaden it. They will, it is true, find themselves in a difficult situation. They will have to admit to themselves the full extent of their helplessness and their insignificance in the machinery of the universe; they can no longer be the centre of creation, no longer the object of tender care on the part of a beneficent Providence. They will be in the same position as a child who has left the parental house where he was so warm and comfortable. But surely infantilism is destined to be surmounted. Men cannot remain children for ever; they must in the end go out into 'hostile life'. We may call this 'education to reality. Need I confess to you that the whole purpose of my book is to point out the necessity for this forward step?

The dream shows how recollections of one’s everyday life can be worked into a structure where one person can be substituted for another, where unacknowledged feelings like envy and guilt can find expression, where ideas can be linked by verbal similarities, and where the laws of logic can be suspended.

Analogies prove nothing, that is quite true, but they can make one feel more at home.