The Missa pro defunctis of the Roman rite is a particularly eloquent expression of that idea first found in the writings of Saint Prosper of Aquitaine: legem credendi lex statuat supplicandi. To paraphrase: the law of prayer establishes the law of belief. The proper texts and rituals of the Requiem Mass, a part of the law of prayer, point to Christian doctrine (that is, the law of belief) and in particular what the Church believes about those who have died. Each word and action this way of celebrating the Mass, offered this evening in its solemn form, beautifully demonstrates what we believe to be our role as the Church militant with respect to our deceased brethren, the Church expectant. There is no doubting that in this somewhat stark and precise liturgical rite we discover a fulsome and rich theology of the dead. By it, echoing the words of the Introit, we offer a true hymn of praise to God, and in particular do so on behalf of our beloved dead: “Thou, O God, art praised in Sion, and unto thee shall the vow be performed in Jerusalem: thou that hearest the prayer, unto thee shall all flesh come” (Ps. 65). In union with the supreme Eucharistic oblation, then, we here present ourselves and our prayers for those “who have gone before us sealed with the seal of faith, and who sleep the sleep of peace,” beseeching the Lord God to grant them “the abode of refreshing, of light, and of peace;” an abode that is found and offered to the faithful in Sion; the heavenly Jerusalem.