Constantly thinking is like having a constant filter between us and the sunshine of life. We experience life through, in between, and over our thoughts. This shuts out the true light. We miss the direct experience.
I don't know about you, but my GPS system has taken me off-route sometimes to some pretty crazy places. When I go off onto those dark roads that just don't seem quite right, I actually defy my GPS and force it to recalculate my route. The same is true in my life.