c. 386–404 · John Chrysostom, Homilies on Philemon (In epistulam ad Philemonem homiliae 1-3) 2
When it is practiced to gain the favor of men, and not of God, that we may be praised, and be high-minded. For this also is diabolical. For as many are vainglorious on account of their not being vainglorious, so are they elated on account of their humbling themselves, by reason of their being high-minded. For instance, a brother has come, or even a servant thou hast received him, thou hast washed his feet; immediately thou thinkest highly of thyself. I have done, thou sayest, what no other has done. I have achieved humility.