Thinking is an experimental dealing with small quantities of energy, just as a general moves miniature figures over a map before setting his troops in action.
Sigmund FreudAmerica is the most grandiose experiment the world has seen, but, I am afraid, it is not going to be a success.
Sigmund FreudMuch of our highly valued cultural heritage has been acquired at the cost of sexuality.
Sigmund FreudLet us consider the polarity of love and hate.... Now, clinical observation shows not only that love is with unexpected regularityaccompanied by hate (ambivalence), and not only that in human relationships hate is frequently a forerunner of love, but also that in many circumstances hate changes into love and love into hate.
Sigmund FreudProperly speaking, the unconscious is the real psychic; its inner nature is just as unknown to us as the reality of the external world, and it is just as imperfectly reported to us through the data of consciousness as is the external world through the indications of our sensory organs.
Sigmund Freud