St. Justin, apologist and martyr, was one of the most important Christian writers of the second century. He himself tells how his study of all the schools of philosophy led him to Christianity, and how he dedicated his life to the defence of the Christian faith as "the one certain and profitable philosophy."

      St. Justin is particularly celebrated for the two Apologies which he was courageous enough to address in succession to the persecuting emperors Antoninus and Marcus Aurelius. One of them contains a description of the rites of baptism and the ceremonies of Mass, thus constituting the most valuable evidence that we possess on the Roman liturgy of his day.

      Justin, the son of Priscus, was a Greek by race, and was born at Nablus in Palestine. He passed his youth in the study of letters. When he grew to manhood he was so taken with the love of philosophy and the desire of truth, that he became a student of philosphy and examined the teaching of all the philosophers. He found in them only deceitful wisdom and error.

      He received the light of heaven from a venerable old man, who was a stranger to him, and embraced the philosophy of the true Christian faith. Henceforth he had the books of Holy Scripture in his hands by day and night, and his soul was filled with the divine fire enkindled by his meditations. Having thus acquired the excellent knowledge of Jesus Christ, he devoted his learning to the composition of many books explaining and propagating the Christian faith.

      Among the most famous of the works of Justin are his two Apologies or Defences of the Christian faith. These he offered in the Senate to the Emperor Antoninus Pius and his sons, together with Marcus Antoninus Verus and Lucius Aurelius Commodus, who were cruelly persecuting the followers of Christ. By these Apologies and his vigorous disputations in defense of the faith he obtained a public edict from the government to stay the slaughter of the Christians. But Justin himself did not escape. He had blamed the wicked life led by Crescens the Cynic, who caused him to be accused and arrested. He was brought before Rusticus, the Prefect of Rome, and questioned concerning the doctrine of the Christians. He was beheaded in Rome in 165.