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.
The experience of prayer is the experience of coming into full union with the energy that created the universe. What Christianity has to proclaim to the world is that that energy is LOVE and it is the well-spring out of which all creation flows. It is the well-spring that gives each one of us the creative power to be the person we are called to be -- a person rooted and formed in love.