"Biology is truly a land of unlimited possibilities. We may expect it to give us the most surprising information, and we cannot guess what answers it will return in a few dozen years. ...They may be of a kind which will blow away the whole of our artificial structure of hypothesis."

“A woman is to soften but not weaken a man.”

“Princess, my little Princess, Oh, how wonderful it will be! I am coming with money and staying a long time and bringing something beautiful for you and then go on to Paris and become a great scholar and then come back to Vienna with a huge, enormous halo, and then we will soon get married, and I will cure all the incurable nervous cases and through you I shall be healthy and I will go on kissing you till you are strong and gay and happy — and "if they haven't died, they are still alive today."”

“How bold one gets when one is sure of being loved.”

“(Speech of Freud before the B'nai B'rith) I soon convinced myself that I owed to my nature as a Jew alone the two qualities that had become indispensable to me in the course of my difficult life. As a Jew, I found myself free of many of those prejudices that limit other men in the use of their intellect and, as a Jew, I found myself ready to go over to the opposition and to renounce agreement with the 'silent majority'. So I became one of yours; I took part in your humanitarian and national interests, made friends among you and later convinced the few friends I had left (Dr Hitschmarm and Dr Rie) to join you. It is not that I wanted to win you over to my teachings, but at a time when no one in Europe listened to you accorded me benevolent attention. You were my first audience.”

“One feels inclined to say that the intention that man should be "happy" is not included in the plan of "Creation.”

“In some place in my soul, in a very hidden corner, I am a fanatical Jew. I am very much astonished to discover myself as such in spite of all efforts to be unprejudiced and impartial. What can I do against it at my age?”