8 The spiritual and temporal orders being, therefore, distinct in their origin and in their nature, should be conceived and judged of as such. For matters of the temporary order - however lawful, however important they be - do not extend, when considered in themselves, beyond the limits of that life which we live on this our earth. But religion, born of God, and referring all things to God, takes a higher flight and touches heaven. For her will, her wish, is to penetrate the soul, man's best part, with the knowledge and the love of God and to lead in safety the whole human race to that City of the Future which we seek for.
Source: Cum Multa (Vatican.va)