Sigmund Freud has become widely known as the founding father of psychoanalysis. His research in the field of psychology pioneered some of the most influential and controversial discoveries of the Twentieth Century. We’ve compiled a list featuring 21 of the best Sigmund Freud quotes:

1. “Time spent with cats is never wasted.”
2. “A woman should soften but not weaken a man.”
3.  “The great question that has never been answered, and which I have not yet been able to answer, despite my thirty years of research into the feminine soul, is ‘What does a woman want?'”
4.  “We are never so defenseless against suffering as when we love.”
5.  “Being entirely honest with oneself is a good exercise.”
6.  “Unexpressed emotions will never die. They are buried alive and will come forth later in uglier ways.”
7.  “Whoever loves becomes humble. Those who love have, so to speak, pawned a part of their narcissism.”
8.  “Religion is an illusion and it derives its strength from the fact that it falls in with our instinctual desires.”
9.  “Out of your vulnerabilities will come your strength.”
10.  “What we call happiness in the strictest sense comes from the (preferably sudden) satisfaction of needs which have been dammed up to a high degree.”
11.  “One is very crazy when in love.”
12.  “One day, in retrospect, the years of struggle will strike you as the most beautiful.”
13.  “Everywhere I go I find a poet has been there before me.”
14.  “The madman is a dreamer awake.”
15.  “Words have a magical power. They can bring either the greatest happiness or deepest despair; they can transfer knowledge from teacher to student; words enable the orator to sway his audience and dictate its decisions. Words are capable of arousing the strongest emotions and prompting all men’s actions.”
16. “Where does a thought go when it’s forgotten?”
17.  “The sexual life of adult women is a “dark continent” for psychology.”
18.  “Beauty has no obvious use; nor is there any clear cultural necessity for it. Yet civilization could not do without it.”
19.  “The first human who hurled an insult instead of a stone was the founder of civilization.”
20. “Look into the depths of your own soul and learn first to know yourself, then you will understand why this illness was bound to come upon you and perhaps you will thenceforth avoid falling ill.”
21. “If you want to live a life, get prepared for death.”

Did we miss one of your favorite quotes by Sigmund Freud? Please feel free to share in the comments.