No, our science is no illusion. But an illusion it would be... - Sigmund Freud, The Future of an Illusion

"Religious doctrines … 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."

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

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

"Thus we arrive at the singular conclusion that of all the information passed by our cultural assets it is precisely the elements which might be of the greatest importance to us and which have the task of solving the riddles of the universe and of reconciling us to the sufferings of life -- it is precisely those elements that are the least well authenticated of any."

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