Desert Fathers : A hermit said to a brother, 'Do not measure yourself against your brother, saying that you are more serious or more chaste or more understanding than he is. But be obedient to the grace of God, in the spirit of poverty, and in love unfeigned. The efforts of a man swollen with vanity are futile. It is written, "Let him that thinks he stands take heed lest he fall" (1 Cor. 10:12); "let your speech be seasoned with salt" (Col. 4:6) and so you will be dependent upon Christ.' — The Desert Fathers, Sayings of the Early Christian Monks Jerome : (Verse 4) But let each one test his own work, and then his reason to boast will be in himself alone and not in his neighbor. The meaning is this: You, who consider yourself spiritual and stronger in the weakness of others, should not focus on the weakness of the one who is falling but on your own strength. For it is not because someone else cannot perfectly transition from Judaism to Christianity that you are a perfect Christian; rather, if your own conscience does not bother you, you have reason to boast in yourself and not in someone else. An athlete is not strong because they have defeated the weak and overpowered the feeble limbs of their opponent, but if they are strong in their own strength, not in the weakness of others. It can be understood another way: one who has a conscience of good work and considers themselves should not boast about it to others, pour out their own praise to the world, share it with everyone, and seek glory from the favor of others. Rather, they should have glory within themselves and say: But far be it from me to boast except in the cross of our Lord Jesus Christ, through whom the world has been crucified to me, and I to the world. He who seeks glory from another, is neither crucified with the world, nor is he himself crucified with Christ. He has indeed received his reward, that which he sought from men. — Commentary on Galatians John Chrysostom : "But let each man prove his own work." Here he shows that we ought to be scrutinizers of our lives, and this not lightly, but carefully to weigh our actions; as for example, if thou hast performed a good deed, consider whether it was not from vain glory, or through necessity, or malevolence, or with hypocrisy, or from some other human motive. For as gold appears to be bright before it is placed in the furnace, but when committed to the fire, is closely proved, and all that is spurious is separated from what is genuine, so too our works, if closely examined, will be distinctly made manifest, and we shall perceive that we have exposed ourselves to much censure. "And then shall he have his glorying in regard of himself alone and not of his neighbor." This he says, not as laying down a rule, but in the way of concession; and his meaning is this: Boasting is senseless, but if thou wilt boast, boast not against thy neighbor, as the Pharisee did. For he that is so instructed will speedily give up boasting altogether; and therefore he concedes a part that he may gradually extirpate the whole. He that is wont to boast with reference to himself only, and not against others, will soon reform this failing also. For he that does not consider himself better than others, for this is the meaning of "not in regard of his neighbor," but becomes elated by examining himself by himself, will afterwards cease to be so. And that you may be sure this is what he desires to establish, observe how he checks him by fear, saying above, "let every man prove his own work," ... — Homily on Galatians 6 Oecumenius : "But let each person prove." Let each person examine his own deeds which he himself performed in life. For by doing this he will prepare himself for better things. Yet this is not the act of one who judges, but of one who humbles himself. For it is not fitting, he says, to boast; if anything, at least do not, he says, boast as the Pharisee did against your neighbor, but against yourself. (see Luke 18:9-14) — [THEODORET] In another way. But if you wish to make a display of your dignity, he says, inspect your own life; and even if you find it blameless, boast of yourself according to your own standard, provided indeed that this is what you ought to do. [end of the excerpt by Theodoret] — — Commentary on Galatians