Would you see the flattery of the foolish Jews? Listen to them, saying, “We have no king but Cæsar.” Would you see humility? Listen to Paul again, when he says, “For we preach not ourselves, but Christ Jesus as Lord, and ourselves as your servants for Jesus' sake.” Would you see both flattery and audacity? “Audacity” in the case of Nabal, and “flattery” in that of the Ziphites? For in their purpose they betrayed David. Would you see “wisdom” and not flattery, that of David, how he gat Saul into his power, and yet spared him?
Would you see the flattery of those who murdered Mephibosheth, whom also David slew? In fine, and as it were in outline, to sum up all, audacity is shown when one is enraged, and insults another for no just cause, either to avenge himself, or in some unjust way is audacious; but boldness and courage are when we dare to face perils and deaths, and despise friendships and enmities for the sake of what is pleasing to God. Again, flattery and meanness are when one courts another not for any right end, but hunting after some of the things of this life; but humility, when one does this for the sake of things pleasing to God, and descends from his own proper station that he may perform something great and admirable.
If we know these things, happy are we if we do them. For to know them is not enough. For Scripture says, “Not the hearers of a law, but the doers of a law shall be justified.” Yea, knowledge itself condemns, when it is without action and deeds of virtue. Wherefore that we may escape the condemnation, let us follow after the practice, that we may obtain those good things that are promised to us, by the grace and love of our Lord Jesus Christ.
Source: Homilies on Philippians (New Advent)