I don't see it quite that way. Standing in the way - yes, there are schools of thought that feel that the intellect is a hinderance or worse to knowing the ultimate truth (or truths - depending on your belief) - I don't think so myself.
Pure understanding - what is it? I think really that is knowing or experiencing... which comes back to that being an non-intellectual, therefore non-language - experience.
Sorry, but my smartphone is now almost dead.
All the best!