Basically, he contrasts two types of thinking. The narrow sort of thinking, where you're totally focused in on one thing, and the "juxtapositional" sort of thi

Basically, he contrasts two types of thinking. The narrow sort of thinking, where you're totally focused in on one thing, and the "juxtapositional" sort of thinking, where you can hold multiple ideas in mind at the same time. The first type of thinking is associated with high stress environments, and the second type of thinking is associated with productive programming, scientific exploration, learning, etc. He goes on to explain the many ramifications of this, which are fascinating, IMO.