Each of us has a setting in our brain, a filter, that determines how tight or loose the connection between ideas needs to be in order for it to bubble up from the subconscious into the consciousm. If the filter is too tight you get high quality ideas but far fewer of them. Too loose and you see patterns and connections everywhere, including those that don't exist. Certain drugs like psychedelics can weaken this filter, and can do so permanently. They can turn you into one of those "whoa, it's all connected, man" retards with no way back.