The Ego and Shadow are carriage driver and horse; as the Self is the carriage, and Perception is the window.
It is frighteningly easy to regress into the slavery of your Ego and Shadow:
It is a fight one must consciously chose to fight within one's self as well as in the world at large; but few seem to recognize it as a choice, they're complacent to be their own slaves; that is to say:
Most people sleep in the carriage while Shadow and Ego mercilessly propel and steer them.