You Cannot Grasp The True Form: Averted in the general case, mostly because the things of which You Cannot Grasp The True Form are also things of which you cannot sense the true form either.  The process of grafting the senses you need into your brain obviously includes the grafting in the parsing routines you need to use said senses, including, if need be, however much vastening is required to use said routines, and so, by the time you’ve been made capable of sensing the true form, you can generally make a fairly decent job of grasping it.

Understanding is still not guaranteed, however.

Also a problem come devastening time, or if you end up as a severed part of a former greater mind, because it really sucks when you can’t comprehend your own memories.