Pope Leo XIII in his encyclical “Mirae Caritatis” (1902) beautifully elaborated this point and emphasized the connection between the communion of saints with the Mass: “The grace of mutual love among the living, strengthened and increased by the sacrament of the Eucharist, flows, especially by virtue of the sacrifice (of the Mass), to all who belong to the communion of saints. For the communion of saints is simply … the mutual sharing of help, atonement, prayers and benefits among the faithful, those already in the heavenly fatherland, those consigned to the purifying fire, and those still making their pilgrim way here on earth. These all form one city, whose head is Christ, and whose vital principle is love. Faith teaches that although the august sacrifice can be offered to God alone, it can nevertheless be celebrated in honor of the saints now reigning in heaven with God, who has crowned them, to obtain their intercession for us, and also, according to apostolic tradition, to wash away the stains of those brethren who died in the Lord but without yet being wholly purified.” Therefore, the offering of Mass and other prayers or sacrifices for the intentions of the faithful departed are truly good and holy acts.