Think of impetus. Where does it come from? Outer to inner? Inner
  to outer? What starts the engines? Always debate about that. My
  contention is that it's generally best to get the inner engine
  functioning properly so that the outer results are more or less
  automatically good. At the same time, the outer affects the
  inner motor. It's a relationship. If I could draw animations
  it'd be easier that way, honestly.