Jesus' detractors try to trap him by setting up a false choice between heresy and sedition. (Either of which is a virtual death sentence in the Roman empire.) Jesus creates a brilliant metaphor that silences his detractors using a Roman coin to point out that we always straddle the sacred and the profane in our everyday lives, and we must deal with both.
Father Jonathan counsels us not forget, however, that we are God's coins, minted from God's treasury, and all claims on us by Earthly matters must be tempered by this realization. We are each a unique coin, of great value, joined together on a pilgrimage toward the ultimate goal: to be in God's presence. To be like a beloved child.