Dreams are constructed from the residue of yesterday.

Religion is an attempt to get control over the sensory world, in which we are placed, by means of the wish-world which we have developed inside us as a result of biological and psychological necessites.

I had thought about cocaine in a kind of day-dream.

Were we fully to understand the reasons for other people's behavior, it would all make sense.

As everyone knows, the ancients before Aristotle did not consider the dream a product of the dreaming mind, but a divine inspiration, and in ancient times the two antagonistic streams, which one finds throughout in the estimates of dream life, were already noticeable. They distinguished between true and valuable dreams, sent to the dreamer to warn him or to foretell the future, and vain, fraudulent, and empty dreams, the object of which was to misguide or lead him to destruction.

The most complicated achievements of thought are possible without the assistance of consciousness.

Where does a thought go when it's forgotten?