The principal signs and instruments of grace available to Christians as a result of Christ's redeeming work are the sacraments of the Church - baptism, confirmation, the Eucharist, penance, extreme unction, holy orders, and marriage. These are the main subjects of Book 4 of the Sentences , comprising forty-two of its fifty Distinctions. In particular, penance and marriage (with regard to which the Lombard's consensual theory was to prove extremely...