Be you therefore perfect, even as your Father who is in heaven is perfect.
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Chromatius of Aquileia
AD 407
The Lord has shown that we cannot have the good work of perfect love if we love only those from whom in turn we know the return of mutual love will be paid in kind. For we know that love of this sort is common even to nonbelievers and sinners. Hence the Lord wishes us to overcome the common law of human love by the law of gospel love, so that we may show the affection of our love not only toward those who love us but even toward our enemies. … Thus we may imitate the example of true piety and our Father’s goodness. .