The interpretation of dreams is the royal road to a knowledge of the unconscious activities of the mind.
Religion is an illusion and it derives its strength from the fact that it falls in with our instinctual desires.
In the last analysis the entire field of psychology may reduce to biological electrochemistry.
When we attempt to imagine death, we perceive ourselves as spectators.
When someone abuses me I can defend myself, but against praise I am defenceless.
It is a mistake to believe that science consists in nothing but conclusively proved propositions, and it is unjust to demand that it should. It is a demand made by those who feel a craving for authority in some form to replace the religious catechism by something else, even a scientific one.
It is unreasonable to expect science to produce a system of ethics-ethics are a kind of highway code for traffic among mankind-and the fact that in physics atoms which were yesterday assumed to be square are now assumed to be round is exploited with unjustified tendentiousness by all who are hungry for faith; so long as physics extends our dominion over nature, these changes ought to be a matter of complete indifference to you.
No, our science is no illusion. But an illusion it would be to suppose that what science cannot give us we can get elsewhere.
The reproaches against science for not having yet solved the problems of the universe are exaggerated in an unjust and malicious manner; it has truly not had time enough yet for these great achievements. Science is very young--a human activity which developed late.
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