His first act, of course, was to cleanse to the Temple, which, at least in Matthew's account, occurs upon His entering the holy city. His week in Jerusalem continues with a whole series of very challenging teachings that challenge the religious authorities, who repeatedly test Him in an effort to trip Him up. Given the overheated political moment we are experiencing here in the U.S. let's look at one such instance that is very relevant:
Then the Pharisees went off and plotted how they might entrap him in speech. They sent their disciples to him, with the Herodians, saying, "Teacher, we know that you are a truthful man and that you teach the way of God in accordance with the truth. And you are not concerned with anyone's opinion, for you do not regard a person's status. Tell us, then, what is your opinion: Is it lawful to pay the census tax to Caesar or not?"
Knowing their malice, Jesus said, "Why are you testing me, you hypocrites? Show me the coin that pays the census tax." Then they handed him the Roman coin. He said to them, "Whose image is this and whose inscription?" They replied, "Caesar's." At that he said to them, "Then repay to Caesar what belongs to Caesar and to God what belongs to God." When they heard this they were amazed, and leaving him they went away. (Matt. 22:15-22)
St. Justin Martyr, the great second century philosopher and Christian apologist wrote, concerning this very passage:
And everywhere we, more readily than all men, endeavour to pay to those appointed by you the taxes both ordinary and extraordinary, as we have been taught by Him; for at that time some came to Him and asked Him, if one ought to pay tribute to Cæsar; and He answered, "Tell Me, whose image does the coin bear?" And they said, "Cæsar's." And again He answered them, "Render therefore to Cæsar the things that are Cæsar's, and to God the things that are God's." Whence to God alone we render worship, but in other things we gladly serve you, acknowledging you as kings and rulers of men, and praying that with your kingly power you be found to possess also sound judgment. But if you pay no regard to our prayers and frank explanations, we shall suffer no loss, since we believe (or rather, indeed, are persuaded) that every man will suffer punishment in eternal fire according to the merit of his deed, and will render account according to the power he has received from God, as Christ intimated when He said, "To whom God has given more, of him shall more be required." Luke 12:48 (First Apology, chapter 17)