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Dear catholic.com visitors: This website from Catholic Answers, with all its many resources, is the world's largest source of explanations for Catholic beliefs and practices. A fully independent, lay-run, 501(c)(3) ministry that receives no funding from the institutional Church, we rely entirely on the generosity of everyday people like you to keep this website going with trustworthy , fresh, and relevant content. If everyone visiting this month gave just $1, catholic.com would be fully funded for an entire year. Do you find catholic.com helpful? Please make a gift today. SPECIAL PROMOTION FOR NEW MONTHLY DONATIONS! Thank you and God bless.

What Does the Expression “Ex Opere Operato” Mean?

Question:

What does the expression ex opere operato mean? Doesn't it have something to do with the sacraments?

Answer:

Ex opere operato is a Latin expression meaning “by the work worked.” It refers to the fact that the sacraments confer grace when the sign is validly effected — not as the result of activity on the part of the recipent but by the power and promise of God.

Now, to receive the fruits of the sacraments, you should be properly disposed. At least in adults, there must be a predispositional receptivity to receive the grace that is always available in a validly effected sacrament. This means reception of grace via the sacraments is not automatic. But the ex opere operato nature of the sacraments reminds us that, while a proper disposition is necessary to receive grace in the sacraments, it isn’t the cause of that grace.

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