Where id was, there ego shall be.

One day, in retrospect, the years of struggle will strike you as the most beautiful.

Civilization began the first time an angry person cast a word instead of a rock.

Every normal person, in fact, is only normal on the average. His ego approximates to that of the psychotic in some part or other and to a greater or lesser extent.

Religious illusion must bow to scientific truth. It is in total error about the nature of the true world. Only science is not an illusion.

Like the physical, the psychical is not necessarily in reality what it appears to us to be.

Men are not gentle, friendly creatures wishing for love, who simply defend themselves if they are attacked, but ... a powerful measure of desire for aggression had to be reckoned as part of their instinctual endowment.