Paul D. MacLean is saying that the Limbic system is the center which applies an over-simplistic dual decision process to a problem or need. It is vastly reducing our abilities. Also, that it adds a little ‘affect’ of it’s own by means of the feelings those events provoke.
Using emotion distorts reality, by means of altering your own perception of the world in your favor or to make up for limited knowledge and still gain self-esteem.
Alone - All One 