The Course in Miracles cannot be understood. It is not understandable. The ego mind will never understand that we are not the ego. The ego is not going to say, "I am lifting myself up." He doesn't do that, so you need help. And this - The Course in Miracles - is help. The more you try to understand, the less you understand.
It is simply incomprehensible but doing the lessons of the Course in Miracles will result in you getting a vision at a given moment. The Course will enable you to have a vision that goes beyond the ego consciousness, that goes beyond the dream, that goes beyond perception through the senses. And that just happens at a given moment.
The teachings are aimed at transformation from fear to Love.