1Be not many masters. The common and almost universal interpretation of this passage is, that the Apostle discourages the desire for the office of teaching, and for this reason, because it is dangerous, and exposes one to a heavier judgment, in case he transgresses: and they think that he said, Be not many masters, because there ought to have been some. But I take masters not to be those who performed a public duty in the Church, but such as took upon them the right of passing judgment upon others: for such reprovers sought to be accounted as masters of morals. And it has a mode of speaking usual among the Greeks as well as Latins, that they were called masters who superciliously animadverted on others.
And that he forbade them to be many, it was done for this reason, because many everywhere did thrust in themselves; for it is, as it were, an innate disease in mankind to seek reputation by blaming others. And, in this respect, a twofold vice prevails — though few excel in wisdom, yet all intrude indiscriminately into the office of masters; and then few are influenced by a right feeling, for hypocrisy and ambition stimulate them, and not a care for the salvation of their brethren. For it is to be observed, that James does not discourage those brotherly admonitions, which the Spirit so often and so much recommends to us, but that immoderate desire to condemn, which proceeds from ambition and pride, when any one exalts himself against his neighbor, slanders, carps, bites, and malignantly seeks for what he may turn to a sinister purpose: for this is usually done when impertinent censors of this kind insolently boast themselves in the work of exposing the vices of others.
From this outrage and annoyance James recalls us; and he adds a reason, because they who are thus severe towards others shall undergo a heavier judgment: for he imposes a hard law on himself, who tries the words and deeds of others according to the rule of extreme rigor; nor does he deserve pardon, who will pardon none. This truth ought to be carefully observed, that they who are too rigid towards their brethren, provoke against themselves the severity of God.