The ego is not master in its own house.

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  The interpretation of dreams is the royal road to a knowledge of the unconscious activities of the mind.

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  No man’s knowledge here can go beyond his experience.

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  Nothing can be created out of nothing.

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  Nature loves to hide.

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  Philosophy is written in this grand book, the universe, which stands continually open to our gaze; it is written in the language of mathematics.

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  God does not play dice.

All quotes