This expression indicates first of all the common sharing of all the members of the Church in holy things (sancta): the faith, the sacraments, especially the Eucharist, the charisms, and the other spiritual gifts. At the root of this communion is love which “does not seek its own interests” (1 Corinthians13:5) but leads the faithful to “hold everything in common” (Acts4:32), even to put one’s own material goods at the service of the most poor.
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Paragraph 960
960. The Church is a "communion of saints": this expression refers first to the "holy things" (sancta), above all the Eucharist, by which "the unity of believers, who form one body in Christ, is both represented and brought about" (LG 3).
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