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Posted on the Memorial of the First Martyrs of the Church of Rome in the Ordinary Form of the Roman Rite. See also these related texts:

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Afterwards… the disciples came to him privately, and said, Tell us, when will this be? And what sign will be given of thy coming, and of the world being brought to an end? Jesus answered them … In those days, men will give you up to persecution, and will put you to death; all the world will be hating you because you bear my name; whereupon many will lose heart, will betray and hate one another. Many false prophets will arise, and many will be deceived by them; and the charity of most men will grow cold, as they see wickedness abound everywhere; but that man will be saved who endures to the last. (St. Matthew xxiv, 3-4, 9-13. Formatting supplied.)

“Many, therefore, of his disciples, hearing it, said: This saying is hard, and who can hear it? … After this many of his disciples went back: and walked no more with him. Then Jesus said to the twelve: Will you also go away? And Simon Peter answered him: Lord, to whom shall we go? thou hast the words of eternal life. And we have believed, and have known that thou art the Christ, the Son of God.” (St. John vi, 61, 67-70. Formatting supplied.)