Today's readings explore the outward and inward dimensions of faithfulness to God. Tertullian argues that true doctrine can be traced back to the apostles through both historical succession and doctrinal continuity, while heresy reveals itself by its lateness and its departure from what was handed down from the beginning. Augustine turns to a much more personal struggle, reflecting on the ordinary temptation of food and drink. Even necessary things can become occasions for disordered desire, and so he wages a daily battle to enjoy God's gifts without becoming enslaved to them. Aquinas then examines adoration and sacrifice, explaining that worship is not merely an inward attitude but is rightly expressed through bodily actions and visible signs. Yet both adoration and sacrifice ultimately point beyond themselves to a deeper reality: the complete s ...