It's the USP of Christianity.
Oddly enough, the most spiritual and holy place, somewhere that you really feel it that I've experienced was Saudi Arabia. All those millions praying 5 times daily does have its effect.
Here in the Africa, the way of life and culture is probably the closest that exists today to the environment that Jesus lived in. When i was in a particularly undeveloped place in the Sahara, where food is short and are hungry, the way meals and scant resources are shared and the joy with wich they share them gave a perspective on the meaning of the last supper and its macro relevance today in terms of socialised health are, welfare, education, housing etc.
I'm not familiar with Underhill
Very worth reading. An Anglican writer popular in the 1920s. She has quite an esoteric slant and is usually spot on.
wasn't she from the middle
Probably Europe's best seller in the decades before printing appeared together with her mentor, Richard Rolle. A little out of fashion but very readable.