Thus, there is no certainty at all with regard to those perceptions of the third mode, i.e., abstract forms, and even less when it comes to abstract forms that have not yet been enclothed in any substance.17This refers to abstract concepts that have no connection to manifest existence and are thus detached from the “real world.” The point here is that attempting to abstract such things is largely useless, since they do not intersect with our grasp of reality. Such perceptions are simply a waste of time.