"Perfect denotes, not absolute sinlessness, but wholeness, the kind of life which is filled with meaningful purpose and which leaves nothing to be desired." —R.L. Scheef, Jr., IOVC, p. 918, commenting Ja 1.2-4.
"Let us clip the wing of our ambition, and the more beware of it because it carries with it the show of virtue." —J.E. Exell, Bibl. Illust.
I used it on QBT today, in part, but here's the whole enchilada, from W.A. VanGemeren's commentary on Psalms 50 in the Expositor's Bible Commentary:
"It was a great temptation of God's covenant people in the past, as it is now, to believe mistakenly that everything is in order between them and God."
Don't flatter yourself that friendship authorizes you to say disagreeable things to your intimates. The nearer you come into relation with a person, the more necessary do tact and courtesy become. Except in cases of necessity, which are rare, leave your friend to learn unpleasant things from his enemies; they are ready enough to tell them.
--Oliver Wendell Holmes