Sigmund Freud

"What we call maturity is the ability to delay gratification."

"Culture arises as a compromise between the individual's desires and the group's demands."

"The unconscious is invisible, inaudible, and unseeable."

"That which we do not remember, we are doomed to repeat."

"In the field of biological knowledge, most educated men are still in the dark ages."

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

"Work and love are the fundamentals of happiness."

"The superego is in constant tension with the ego and the id."

"Artistic talent and creative ability are often found in those with psychological conflicts."

"The female is a lesser male."

"War is one of the few activities that people are absolutely sure about."

"We cannot live only for ourselves, thousands of fibers connect us to our fellow humans."

"The mind has no gender."

"Courage is not the absence of fear, but rather an assessment that something else is more important than fear."

"In the human mind, nothing can be created from nothing; it is all a matter of working with existing materials."

"Time is a mystery, something humans have never fully understood."

"The task of converting mankind to a just society requires more than analytical insight."

"A transference neurosis is conquered by working with the patient's defenses and resistances."

"The ego is not master in its own house."

"Symbols are the natural language of the unconscious."

"Most of what drives human behavior lies beneath conscious awareness."

"The relationship between patient and analyst is itself a therapeutic tool."

"One behaves as though one's own death is unimaginable."

"The more the conflict is repressed the more pathological becomes the result."

"Acting out repressed emotions is the gateway to freedom."

"We are attracted to others by what lies beneath the surface."

"The capacity to work is among the most essential attributes of human beings."

"Forgetting is often a form of self-protection."

"Human beings are capable of infinite self-deception."

"The art of making conversation is the foundation of all human relations."