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HOW are the bread and wine changed into the Body and Blood of Christ?
The bread and wine are changed into the Body and Blood of Christ by the power of God, to whom nothing is impossible or difficult.
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WHEN are the bread and wine changed into the Body and Blood of Christ?
The bread and wine are changed into the Body and Blood of Christ when the words of consecration, ordained by Jesus Christ, are pronounced by the priest in Holy Mass.
So, if you ask me how? I will answer by the power of God.
If you ask me when? At the words of consecration by a validly ordained priest.
God no go shame us!
