1 Peter 3:3–4: Beauty in the Hidden Heart
Peter does not forbid outward care; he relocates beauty to the hidden person of the heart. A gentle and quiet spirit is called incorruptible because it outlasts hair, gold and clothing, and God himself calls it precious.
2 Peter 1:5–7: The Shape of Godly Character
Peter does not hand us eight separate virtues to collect. He describes one life-shape, each quality supplying what the next requires, and he grounds the whole effort in what God has already granted.