Sometimes it is as though the praise of God filled with world; as if it went out to and enfolded all creation, as for instance in the Psalms of creation or in the response which those songs have found in the hearts of God-enraptured people sucYh as St. Francis of Assisi. … This is not a fairy-tale approach to nature in which the sun and the moon, the trees, and so forth are personalized and given voices with which to sing the praise of God; it is an inspired poetic rendering of the idea that the sun and the moon and all created things are a mirror of God’s glory because, as His creation, they reflect something of His nature. In so doing, they praise Him by their very existence. They themselves know nothing of it, but man does; he can think himself into their silent song of praise; he can voice it on their behalf, offer it up to God and thus act as the spokesman of creation.
— Romano Guardini, The Art of Praying