244. Q. Did anything remain of the bread and wine after their substance had been changed into the substance of the body and blood of our Lord? A. After the substance of the bread and wine had been changed into the substance of the body and blood of our Lord there remained only the appearances of bread and wine. 245. Q. What do you mean by the appearances of bread and wine? A. By the appearances of bread and wine I mean the figure, the color, the taste, and whatever appears to the senses. 246. Q. What is this change of the bread and wine into the body and blood of our Lord called? A. This change of the bread and wine into the body and blood of our Lord is called Transubstantiation. 247. Q. How was the substance of the bread and wine changed into the substance of the body and blood of Christ? A. The substance of the bread and wine was changed into the substance of the body and blood of Christ by His almighty power. 248. Q. Does this change of bread and wine into the body and blood of Christ continue to be made in the Church? A. This change of bread and wine into the body and blood of Christ continues to be made in the Church by Jesus Christ through the ministry of His priests. 249. Q. When did Christ give His priests the power to change bread and wine into His body and blood? A. Christ gave His priests the power to change bread and wine into His body and blood when He said to the Apostles, Do this in commemoration of Me. 250. Q. How do the priests exercise this power of changing bread and wine into the body and blood of Christ? 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. LESSON TWENTY-THIRD ON THE ENDS FOR WHICH THE HOLY EUCHARIST WAS INSTITUTED 251. Q. Why did Christ institute the Holy Eucharist? A. Christ instituted the Holy Eucharist-- 1. To unite us to Himself and to nourish our soul with His divine life. 2. To increase sanctifying grace and all virtues in our soul. 3. To lessen our evil inclinations. 4. To be a pledge of everlasting life. 5. To fit our bodies for a glorious resurrection. 6. To continue the sacrifice of the Cross in His Church. 252. Q. How are we united to Jesus Christ in the Holy Eucharist? A. We are united to Jesus Christ in the Holy Eucharist by means of Holy Communion. 253. Q. What is Holy Communion? A. Holy Communion is the receiving of the body and blood of Christ. 254. Q. What is necessary to make a good Communion? A. To make a good Communion it is necessary to be in the state of sanctifying grace, to have a right intention, and to obey the laws of fasting. (See Q. 257.) 255. Q. Does he who receives Communion in mortal sin receive the body and blood of Christ? A. He who receives Communion in mortal sin receives the body and blood of Christ, but does not receive His grace, and he commits a great sacrilege.