Render unto Caesar the things that are Caesar's, and unto God the things that are God's. It is as though our Lord said, "Since you Jews are now subject to Caesar—and there is here this evidence of it, that his coin is current amongst you; you would not use it were you not obliged, because all Gentile rites and symbols are an abhorrence to you;—but since Caesar demands nothing of you but his tribute—the coin stamped with his own image and name—it is your duty to render to him his own denarius for tribute.
But spiritual things, such as worship and obedience, give these to God; for these he demands from you as his right, and by so doing you will offend neither God nor yet Caesar." Our Lord, in his infinite wisdom, avoids the question altogether whether the Jews were rightly in subjection to the Romans.
This was a doubtful question. But there could be no doubt as to the fact that they were tributary. This was made plain by the evidence of the current coin. Now, this being so, it was manifestly the duty of the Jewish people to give to Caesar the tribute money which he demanded of them for the expenses of government, and especially of supporting an army to defend them from their enemies.
And it was no less their duty to give their tribute to God, which he in his own right demanded of them as his creatures and faithful subjects. The rights of Caesar are one thing, and those of God are another; and there is nothing that need clash between them.
State polity is not opposed to religion, nor religion to state. Tertullian says, "'Render to Caesar the things that are Caesar's, and to God the things that are God's;' that is, give to Caesar his image stamped upon his coin, and give to God his own image stamped upon you; so that while you render to Caesar the coin which is his due, you may render your own self to God."
This wonderful answer of our Lord teaches us that we ought to try to speak so wisely, and so to moderato our speech amongst those who are captious, that we may, if possible, offend neither side, but steer safely between Scylla and Charybdis.
And they marvelled at him. The true Greek reading of the verb here is not ἐθαύμασαν, but ἐξεθαύμαζον, they marvelled greatly at him; they stood marvelling greatly at him. They marvelled at his wisdom and skill in extricating himself so readily out of this net in which they had hoped to entangle him.
Indeed, the words of the psalmist (Psalms 9:15) were verified in them: "The wicked is snared in the work of his own hands." He vaulted over the trap set for him, leaving them entangled in it. He lifted up the question far above the petty controversy of the hour, and affirmed a great principle of natural and religious obligation which belongs alike to all times and persons and places.