Lives of the Saints, by Alban Butler, Benziger Bros. ed. [1894], at sacred-texts.com
IN the year 95, St. John, who was the only surviving apostle, and governed all the churches of Asia, was apprehended at Ephesus, and sent prisoner to Rome. The Emperor Domitian did not relent at the sight of the venerable old man, but condemned him to be cast into a caldron of boiling oil. The martyr doubtless heard, with great joy, this barbarous sentence; the most cruel torments seemed
to him light and most agreeable, because they would, he hoped, unite him forever to his divine Master and Saviour. But God accepted his will and crowned his desire; He conferred on him the honor and merit of martyrdom, but suspended the operation of the fire, as He had formerly preserved the three children from hurt in the Babylonian furnace. The seething oil was changed in his regard into an invigorating bath, and the Saint came out more refreshed than when he had entered the caldron. Domitian saw this miracle without drawing from it the least advantage, but remained hardened in his iniquity. However, he contented himself after this with banishing the holy apostle into the little island of Patmos. St. John returned to Ephesus, in the reign of Nerva, who by mildness, during his short reign of one year and four months, labored to restore the faded lustre of the Roman Empire. This glorious triumph of St. John happened without the gate of Rome called Latina. A church which since has always borne this title was consecrated in the same place in memory of this miracle, under the first Christian emperors.
Reflection.—St. John suffered above the other Saints a martyrdom of love, being a martyr, and more than a martyr, at the foot of the cross of his divine Master. All his sufferings were by love and compassion imprinted in his soul, and thus shared by him. O singular happiness, to have stood under the cross of Christ! O extraordinary privilege, to have suffered martyrdom in the person of Jesus, and been eye-witness of all He did or endured! If nature revolt within us against suffering, let us call to mind those words of the divine Master: "Thou knowest not now wherefore; but thou shalt know hereafter."