It is a mistake to believe that science consists in nothing but conclusively proved propositions, and it is unjust to demand that it should. It is a demand made by those who feel a craving for authority in some form to replace the religious catechism by something else, even a scientific one.
Sigmund FreudMy boy! Smoking is one of the greatest and cheapest enjoyments in life, and if you decide in advance not to smoke, i can only feel sorry for you.
Sigmund FreudI am not aware, however, that patients suffering from traumatic neurosis are much occupied in their waking lives with memories of their accident. Perhaps they are more concerned with not thinking of it.
Sigmund FreudJust as a cautious businessman avoids investing all his capital in one concern, so wisdom would probably admonish us also not to anticipate all our happiness from one quarter alone.
Sigmund Freud