Das Ich sei zuallererst ein körperliches und werde durchzogen von Triebkräften, die entlang von körperlichen Vorgängen ihre Organisation erfahren.

Where id was, there ego shall be.

The pleasure of satisfying a savage instinct, undomesticated by the ego, is uncomparably much more intense than the one of satisfying a tamed instinct. The reason is becoming the enemy that prevents us from a lot of possibilities of pleasure.

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.