We do not need to be experts or geniuses to remember that all of existence is precious. We do not need cathedrals to remind ourselves to experience the sacred. We need only to be deeply respectful of what is fundamentally true; and that is what we rediscover when we center ourselves in silence.
Nothing is more difficult than prayer. In all other tasks of spiritual life, however exacting, one can sometimes rest, but there is no rest in prayer, up to the end of one's life.