The Painted Veil by William Somerset Maugham

Though the Mother Superior talked with Kitty not more than three or four times and once or twice for but ten minutes the impression she made upon Kitty was profound. Her character was like a country which on first acquaintance seems grand, but inhospitable; but in which presently you discover smiling little villages among fruit trees in the folds of the majestic mountains, and pleasant ambling rivers that flow kindly through lush meadows. But these comfortable scenes, though they surprise and even reassure you, are not enough to make you feel at home in the land of tawny heights and windswept spaces. It would have been impossible to become intimate with the Mother Superior; she had that something impersonal about her which Kitty had felt with the other nuns, even with the good-humoured, chatty Sister St. Joseph, but with her it was a barrier which was almost palpable. It gave you quite a curious sensation, chilling but awe-inspiring, that she could walk on the same earth as you, attend to mundane affairs, and yet live so obviously upon a plane you could not reach. She once said to Kitty:

‘It is not enough that a religious should be continually in prayer with Jesus; she should be herself a prayer.'