This idea is another step in the direction of identifying cause and effect as it really operates in the world. You see no neutral things because you have no neutral thoughts. It is always the thought that comes first, despite the temptation to believe that it is the other way around. This is not the way the world thinks, but you must learn that it is the way you think. If it were not so, perception would have no cause, and would itself be the cause of reality. In view of its highly variable nature, this is hardly likely.