I have mentioned this in a comment before, not sure if it was on your post, but one of the reasons that religious buildings, especially roman buildings, are built with such a high ceiling, is because it makes you feel like there is something bigger out there. Think of looking at a massive mountain or a waterfall. You get a reassuring feeling that there is something bigger out there than you. I still believe that there is also a special "feeling" you get in addition to this, but this contributes.