Philo Judaeus De Decalogo 110

[110] Now, one may properly call both these latter, these philanthropic men, and also the former class, the lovers of God, but half perfect in virtue; for those only are perfect who have a good reputation in both points: but those who do not attend to their duties towards men so as to rejoice with them at their common blessings, or to grieve with them at events of a contrary character, and who yet do not devote themselves to piety and holiness towards God, may be thought to have changed into the nature of wild beasts, the very pre-eminence among whom, in point of ferocity, those are entitled to who neglect their parents, being hostile to both the divisions of virtue above mentioned, namely, piety towards God, and their duty towards men.