a person should either remain as he was born, or be content with one marriage; for a second marriage is only a specious adulteryPlea for the Christians (AD 177)
He Himself took on Him the burden of our iniquities, He gave His own Son as a ransom for us, the holy One for transgressors, the blameless One for the wicked, the righteous One for the unrighteous, the incorruptible One for the corruptible, the immortal One for those who are mortal. For what other thing was capable of covering our sins than His righteousness? By what other one was it possible that we, the wicked and ungodly, could be justified, than by the only Son of God? O sweet exchange! O unsearchable operation! O benefits surpassing all expectation! That the wickedness of many should be hid in a single righteous One, and that the righteousness of One should justify many transgressors!Epistle to Diognetus, http://www.newadvent.org/fathers/0101.htm
Let us therefore no longer keep the Sabbath after the Jewish manner, and rejoice in days of idleness; for "he that does not work, let him not eat." For say the [holy] oracles, "In the sweat of thy face shalt thou eat thy bread." But let every one of you keep the Sabbath after a spiritual manner, rejoicing in meditation on the law, not in relaxation of the body, admiring the workmanship of God, and not eating things prepared the day before, nor using lukewarm drinks, and walking within a prescribed space, nor finding delight in dancing and plaudits which have no sense in them. And after the observance of the Sabbath, let every friend of Christ keep the Lord's Day as a festival, the resurrection-day, the queen and chief of all the dayshttps://www.earlychristianwritings.com/text/ignatius-magnesians-longer.html
They asserted, however, that the sum and substance of their fault or error had been that they were accustomed to meet on a fixed day before dawn and sing responsively a hymn to Christ as to a god, and to bind themselves by oath, not to some crime, but not to commit fraud, theft, or adultery, not falsify their trust, nor to refuse to return a trust when called upon to do so. When this was over, it was their custom to depart and to assemble again to partake of food -but ordinary and innocent food.
The words of the Decalogue... remain permanently with us, receiving by means of his advent in the flesh, extension and increase, but not abrogation.Against Heresies
The universal and uncontradicted Sunday observance in the second century can only be explained by the fact that it had its roots in apostolic practice. Such observance is the more to be appreciated as it had no support in civil legislation before the age of Constantine, and must have been connected with many inconveniences, considering the lowly social condition of the majority of Christians and their dependence upon their heathen masters and employers. Sunday thus became, by an easy and natural transformation, the Christian Sabbath or weekly day of rest, at once answering the typical import of the Jewish Sabbath, and itself forming in turn a type of the eternal rest of the people of God in the heavenly Canaan.https://ccel.org/ccel/schaff/hcc1/hcc1.i.IX.57.html
In the gospel dispensation the Sabbath is not a degradation, but an elevation, of the week days to a higher plane, looking to the consecration of all time and all work. It is not a legal ceremonial bondage, but rather a precious gift of grace, a privilege, a holy rest in God in the midst of the unrest of the world, a day of spiritual refreshing in communion with God and in the fellowship of the saints, a foretaste and pledge of the never-ending Sabbath in heaven.https://ccel.org/ccel/schaff/hcc1/hcc1.i.IX.57.html
O the sweet exchange, O the incomprehensible work of God, O the unexpected blessings, that the sinfulness of many should be hidden in one righteous man, while the righteousness of one should justify many sinners.Epistle to Diognetus, 9.5
Therefore, to squelch the rumor, Nero created scapegoats and subjected to the most refined tortures those whom the common people called "Christians," [a group] hated for their abominable crimes. Their name comes from Christ, who, during the reign of Tiberius, had been executed by the procurator Pontius Pilate. Suppressed for the moment, the deadly superstition broke out again, not only in Judea, the land which originated this evil, but also in the city of Rome.The Annals (15.44)
There is, brethren, one God, the knowledge of whom we gain from the Holy Scriptures, and from no other source. Whatever things, then, the Holy Scriptures declare, at these let us look; and whatsoever things they teach, these let us learn.Against the Heresy of One Noetus, 9.