Sigmund Freud was perhaps the most prolific and well known neurologist and later, psychoanalyst, of the entire psychological world. He was the founder of psychoanalysis. Here are some of his quotes.
No one who, like me, conjures up the most evil of those half-tamed demons that inhabit the human breast, and seeks to wrestle with them, can expect to come through the struggle unscathed. Dora: An Analysis of a Case of Hysteria
Beauty has no obvious use; nor is there any clear cultural necessity for it. Yet civilization could not do without it. Civilisation and its Discontents.
At bottom God is nothing more than an exalted father.-Totem and Taboo
What progress we are making. In the Middle Ages they would have burned me. Now they are content with burning my books. Freud’s letter to Ernest Jones, 1933
One feels inclined to say that the intention that man should be “happy” is not included in the plan of “Creation.” Civilisation and its Discontents.