I want listeners to notice how the texts press the same pastoral problem from different angles: can the deposit of faith be hidden, corrupted, or diluted? Tertullian answers decisively that the apostles did not hoard doctrine nor teach conflicting gospels; Paul’s rebuke of Peter was a correction of conduct, not a new doctrine, and the churches—rebuked when necessary—were still the channels of apostolic truth. Augustine reminds us that every good thing we receive is by God’s gift; our being-from-darkness into light is an immediate, gracious act that grounds humility and praise. Aquinas (Question 16, combined) brings the moral focus home: use (the will’s act toward means) belongs to deliberation and the will insofar as reason presents means for an end—so faithful practice requires rightly ordered desire, rightly formed reason, and a will that conse ...