Find accurate definitions of over 5,000 Catholic terms and phrases (including abbreviations). Based on Fr. John Hardon's Modern Catholic Dictionary, © Eternal Life. Used with permission.
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EX OPERE OPERATO
A term defined by the Council of Trent to describe how the sacraments confer the grace they signify. Trent condemned the following proposition: "That grace is not conferred 'ex opere operato' by the sacraments of the New Law" (Denzinger 1608). Literally the expression means "from the work performed," stating that grace is always conferred by a sacrament, in virtue of the rite performed and not as a mere sign that grace has already been given, or that the sacrament stimulates the faith of the recipient and thus occasions the obtaining of grace, or that what determines the grace is the virtue of either the minister or recipient of a sacrament. Provided no obstacle (obex) is placed in the way, every sacrament properly administered confers the grace intended by the sacrament. In a true sense the sacraments are instrumental causes of grace.