This, then, is what belongs to Cæsar—that is, to the state. It has the right to claim and enforce our obedience to laws intended for the temporal welfare of its subjects, and to these only as far as they are not contrary to the eternal law of God, or to others which he may choose to make. And that is all.
When it does not exceed its rights we must give our obedience to it; and we must presume that it does not exceed them unless it is clear that it does. This is what we must render to Cæsar.
But how shall we tell that it does exceed its rights? First, by the voice of conscience, when that voice is clear and certain; secondly, by our knowledge of the laws which God himself has made; lastly, by the voice of that other authority which he has put in the world to provide for our spiritual welfare—that is, the Catholic Church. When God speaks to us in either of these ways we must obey him whether it interferes with Cæsar or not; this is what we must render to him.
If the state makes a law commanding us to blaspheme, deny our faith, or commit impurity, we will not obey. Conscience annuls such a law. If the state commands us to do servile work on Sunday its law has no force. We know that God's law is against it. And, lastly, if the state goes outside its sphere, and makes laws regarding things not belonging to its jurisdiction, as the sacraments, we are not bound by such laws. It has no power, for instance, to declare marriage among Christians valid or invalid. The church has told us this plainly. It is here specially where the state goes out of its province, that it is subject to correction by the church; though it may be in other matters also.
Our Lord, then, means that we should render to Cæsar the things that belong to him, not because of any right that he has in himself, but because God has lent it to him; but that we should render to God the things that he has not lent to Cæsar, whether Cæsar consents or not. Obedience must always be given to God. Give it to him through the state in those things about which he has given the state authority, and in other things without regard to the state; thus shall you render to Cæsar the things which are Cæsar's, and to God the things that are God's.
Twenty-third Sunday after Pentecost.
Epistle.
Philippians iii. 17; iv. 3.