He that has eyes to see and ears to hear may convince himself that no mortal can keep a secret. If his lips are silent, he chatters with his fingertips; betrayal oozes out of him at every pore.

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.

All elongated objects, such as sticks, tree-trunks and umbrellas(the opening of these last being comparable to an erection) may stand for the male organ...Boxes, cases, chests, cupboards, and ovens represent the uterus...Rooms in dreams are usually women...Many landscapes in dreams, especially any containing breidges or wooded hills, may clearly be recognized as descriptions of the genitals.

Only the real, rare, true scientific minds can endure doubt, which is attached to all our knowledge.

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

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

There is an intellectual function in us which demands unity, connection and intelligibility from any material, whether of perception or thought, that comes within its grasp; and if, as a result of special circumstances, it is unable to establish a true connection, it does not hesitate to fabricate a false one.