Godly love cannot be perfect unless a man love his neighbor also. Under which name must be included not only those who are connected with us by friendship or neighborhood, but absolutely all men, with whom we have a common nature, whether they be foes or allies, slaves or free.
-St. Gregory the Dialogist, Sermon 12, On the Fast, 6th century


For here He reproves their purpose, wherewith they built, that it was not for the honoring of them that were slain, but as making a show of the murders...setting up these glorious buildings, as a kind of trophy, and priding themselves in the daring deeds of those men, and displaying them...And what blame is it to be a murderer's son, if one partake not in the mind of one's father? None. Whence it is evident, that for this same thing He brings it forward against them, hinting at their affinity in wickedness...and that it was a pretense to say, "We should not have been partakers with them,"...they spake out of vainglory, and were practicing virtue in words only, but in their works doing the contrary.
-St. John Chrysostom, Homily 74 on Matthew 23, 4th Century