Raised was the thought by some who said that Heath made his role as Ennis: real!!
For such maybe Heath learned possibly by trial and error, yes nothing wrong doing so on his own, if one hears him say in a way when he talked about it... to accent sounds, certain words... more and more inner did he say about Ennis on that??
Could it be that Heath was the first actor to do that, or among the firsts in certain ways of acting?? What a tour-de-force he did, evidently!! With such skill... and such realness!!
Hugs!! P.S. There was an actress who had done a role of a blind and ... person; she became more tha heartbroken because of it! So, I suppose that Heath must have put himself in a difficult role and maybe was dire because of it, surely emotional was that charactorized role!!