Irenaeus of Lyons
c. 130–c. 202
Bishop in Gaul whose Against Heresies answered Gnosticism and set out the rule of faith and the unity of the two Testaments.
In his own words
Moreover, this impious opinion of theirs with respect to actions--namely, that it is incumbent on them to have experience of all kinds of deeds, even the most abominable--is refuted by the teaching of the Lord, with whom not only is the adulterer rejected, but also the man who desires to commit adultery; [3266] and not only is the actual murderer held guilty of having killed another to his own damnation, but the man also who is angry with his brother without a cause: who commanded [His disciples] not only not to hate men, but also to love their enemies; and enjoined them not only not to swear falsely, but not even to swear at all; and not only not to speak evil of their neighbours, but not even to style any one "Raca" and "fool;" [declaring] that otherwise they were in danger of hell-fire; and not only not to strike, but even, when themselves struck, to present the other cheek [to those that maltreated them]; and not only not to refuse to give up the property of others, but even if their own were taken away, not to demand it back again from those that took it; and not only not to injure their neighbours, nor to do them any evil, but also, when themselves wickedly dealt with, to be long-suffering, and to show kindness towards those [that injured them], and to pray for them, that by means of repentance they might be saved--so that we should in no respect imitate the arrogance, lust, and pride of others.
Quoted verbatim from the library, as an answer would quote it.
What we hold of him
Against Heresies
Church father
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