The spiritual function of fierce terrain (in the apophatic tradition) is to bring us to the end of ourselves, to the abandonment of language and the relinquishment of ego. A vast expanse of jagged stone, desert sand, and towering thunderheads has a way of challenging all the mental constructs in which we are tempted to take comfort and pride, thinking we have captured the divine. The things that ignore us save us in the end.
Vocation to Solitude — To deliver oneself up, to hand oneself over, entrust oneself completely to the silence of a wide landscape of woods and hills, or sea, or desert; to sit still while the sun comes up over that land and fills its silences with light. To pray and work in the morning and to labor and rest in the afternoon, and to sit still again in meditation in the evening when night falls upon that land and when the silence fills itself with darkness and with stars... to belong completely to such silence, to let it soak into the bones, to breathe nothing but silence, to feed on silence, and to turn the very substance of life into a living and vigilant silence.