Cruelty and intolerance to those who do not belong to it are natural to every religion.
Sigmund FreudThe price we pay for our advance in civilization is a loss of happiness through the heightening of the sense of guilt.
Sigmund FreudThe assumption that everything past is preserved holds good even in mental life only on condition that the organ of the mind has remained intact and that its tissues have not been damaged by trauma or inflammation. But destructive influences which can be compared to causes of illness like these are never lacking in the history of a city, even if it has had a less chequered past than Rome, and even if, like London, it has hardly ever suffered from the visitations of an enemy.
Sigmund FreudWhat we call happiness in the strictest sense comes from the (preferably sudden) satisfaction of needs which have been dammed up to a high degree.
Sigmund Freud