So even though sensation is largely read out from the world, it nevertheless is of a much more determinate nature than the flexible nature of shifting gestalts. In cognition almost anything can be. In class the creative, changeable aspect of cognition was evident because we, ourselves, had to do the gestalt changing. The gestalt pictures should put an end to the notion that our groupings or categories are simply the passive reflection of sensed similarities inherent in the objects of the world. Culturally determined cognitive groupings or categories differentially select which sensed stimuli will be used to group things together into likes or dislikes.
Every linguistic noun is such a selection.
Our ideologies then define those that see differently as perverts and enemies. Its what you see the world in terms of. Because it is so foundational to your experience, it becomes the lens to your glasses. You see through, and by means of your emotions and do not see them in the process. Their work is hidden.