From G. K. Chesterton’s book St. Francis in chapter five:
It is commonly in a somewhat cynical sense that men have said, “Blessed is he that expecteth nothing, for he shall not be disappointed.” It was in a wholly happy and enthusiastic sense that Saint Francis said, “Blessed is he who expecteth nothing, for he shall enjoy everything.” It was by this deliberate idea of starting from zero, from the dark nothingness of his own deserts, that he did come to enjoy even earthly things as few people have enjoyed them; and they are in themselves the best working example of the idea. For there is no way in which a man can earn a star or deserve a sunset. But there is more than this involved, and more indeed than is easily to be expressed in words. It is not only true that the less a man thinks of himself, the more he thinks of his good luck and of all the gifts of God.
It is also true that he sees more of the things themselves when he sees more of their origin; for their origin is a part of them and indeed the most important part of them. Thus they become more extraordinary by being explained. He has more wonder at them but less fear of them; for a thing is really wonderful when it is significant and not when it is insignificant; and a monster, shapeless or dumb or merely destructive, may be larger than the mountains, but is still in a literal sense insignificant. For a mystic like Saint Francis the monsters had a meaning; that is, they had delivered their message. They spoke no longer in an unknown tongue. That is the meaning of all those stories whether legendary or historical, in which he appears as a magician speaking the language of beasts and birds. The mystic will have nothing to do with mere mystery; mere mystery is generally a mystery of iniquity.