### Instruction: Q. 250. How do the priests exercise this power of changing bread and wine into the body and blood of Christ?

### Response: A. The priests exercise this power of changing bread and wine into the body and blood of Christ through the words of consecration in the Mass, which are the words of Christ: This is My body; this is My blood.

-- Source: Baltimore Catechism #1 / LESSON EIGHTEENTH ON THE HOLY EUCHARIST / Q. 250