Dreams are the royal road to the unconscious.

It is easy to see that the ego is that part of the id which has been modified by the direct influence of the external world.

Knowledge is the intellectual manipulation of carefully verified observations.

Where id was, there ego shall be.

America is the most grandiose experiment the world has seen, but, I am afraid, it is not going to be a success.

If you can't do it, give up!

It is no wonder if, under the pressure of these possibilities of suffering, men are accustomed to moderate their claims to happiness - just as the pleasure principle itself, indeed, under the influence of the external world, changed into the more modest reality principle -, if a man thinks himself happy merely to have escaped unhappiness or to have survived his suffering, and if in general the task of avoiding suffering pushes that of obtaining pleasure into the background.