One day as St. Bernard was about to say Mass in the church of St. Ambrose at Milan, the people brought to the church a lady of high rank who had been sick for many years. She had lost her sight, her hearing and her speech, and her tongue had become so long that it protruded out of her mouth. St. Bernard, having exhorted the people to join him in praying for her, began to celebrate Mass, and as often as he made the Sign of the Cross over the Host, he made it over the sick woman also. As soon as he had broken the Host and said, "Pax Domini sit semper vobiscum," she was instantly cured. The people, filled with joy and astonishment, began to ring the bells, and soon the whole city hastened to the church to witness the miracle and to give thanks to God. (Life of St. Bernard).

The Blessed Eucharist, Our Greatest Treasure
Fr. Michael Muller, C.S.S.R.