For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God hath dealt to every man the measure of faith. (Romans 12:3,4)
Here again Paul insists on humility, which is how he started this whole exhortation. For since there was a probability that the Romans would be high minded because of the greatness of their city and for many other reasons, he keeps drawing off the sickness of pride.… There is nothing so likely to cause schisms in the church as vanity.…
If a poor man comes into your house, behave like him and do not put on airs because of your riches. In Christ there is no rich or poor. Do not be ashamed of him because of his outward dress, but receive him because of his inward faith. If you see him in sorrow, do not hesitate to comfort him, and if he is prospering, do not feel shy about sharing in his pleasure.… If you think you are a great person, then think others are also. If you think they are humble and lowly, then think the same of yourself.
St John Chrysostom – Homilies on Romans