In the last analysis the entire field of psychology may reduce to biological electrochemistry.

The study of dreams may be considered the most trustworthy method of investigating deep mental processes. Now dreams occurring in traumatic neuroses have the characteristic of repeatedly bringing the patient back into the situation of his accident, a situation from which he wakes up in another fright.

There is little that gives children greater pleasure than when a grown-up lets himself down to their level, renounces his oppressive superiority and plays with them as an equal.

I do not in the least underestimate bisexuality... I expect it to provide all further enlightenment.

But the repressed merges into the id as well, and is merely a part of it. The repressed is only cut off sharply from the ego by the resistances of repression; it can communicate with the ego through the id.

The ego represents what we call reason and sanity, in contrast to the id which contains the passions.

The only shame in masturbation is the shame of not doing it well.