Saint Agatha was born in Sicily of rich and noble parents, a child of benediction from the first, for she was promised to her parents before her birth, and consecrated from her earliest infancy to God.
In the midst of dangers and temptations she served Christ in purity of body and soul, and she died for love of chastity. Quintanus, who governed Sicily under the Emperor Decius, had heard the rumor of her beauty and wealth, and he made the laws against the Christians a pretext for summoning her from Palermo to Catania, where he was at the time. O Jesus Christ! she cried, as she set out on this dreaded journey, all that I am is Thine; preserve me against the tyrant.
And Our Lord did indeed preserve one who had given herself so utterly to Him. He kept her pure and undefiled while she was imprisoned for a whole month under charge of an evil woman. He gave her strength to reply to the offer of her life and safety, if she would but consent to sacrifice to the gods, Christ alone is my salvation! When Quintanus turned from passion to cruelty, and cut off her breasts, Our Lord sent the Prince of the Apostles to heal her. She told the elderly gentleman who appeared to her that she was Christian and desired no treatment, for her Lord could cure her by a single word. He smiled, identified himself as Saint Peter, and said: It is in His name that you will be healed. And when he disappeared, she saw that her wounds were healed and her flesh made whole. But when she was rolled naked upon potsherds, she asked that her torments might be ended. Her Lord heard her prayer and took her to Himself.
Saint Agatha gave herself without reserve to Jesus Christ; she followed Him in virginal purity, and then depended upon Him for protection. And to this day Christ has shown His tender regard for the very body of Saint Agatha. Again and again, during the eruptions of Mount Etna, the people of Catania have exposed her veil for public veneration, and found safety by this means. In modern times, on opening the tomb in which her body lies waiting for the resurrection, they beheld the skin still entire, and experienced the sweet fragrance which issued from this temple of the Holy Ghost.
Source: sactoral.com