Thus Saint Mitrophanes interprets this saying.
Here the divine James speaks by way of exaggeration. He does not mean to show that it is impossible for man to conquer his tongue and not sin in word. Rather, he shows how difficult it is to conquer it.
Indeed, this is so difficult that many times even righteous and blameless men sin with the tongue, when they do not give it due attention. Thus it is written in Job: "If I am righteous, my mouth will make me ungodly; if I am blameless, I shall be crooked" (Job 9:20).
That it is not impossible for man to tame his tongue and not sin in word, with God's help, David showed when he said: "I said, I will guard my ways, that I may not sin with my tongue" (Ps 38:1).
The venerable Pambo also showed this, as we have already said above. James himself showed it when he said: "If anyone does not stumble in word, he is a perfect man" (Jas 3:2).
Those who are perfect and watchful have attained, do attain, and will attain, by the grace of Christ, the state of not sinning in word. Such men either love silence by free choice, or are naturally sparing of speech.
But for those far from perfection, inattentive and talkative, it is exceedingly hard to conquer the tongue and not sin in word.
Therefore the brother of God says here that no man can tame his tongue. That is, no passionate man can do so by human and earthly effort, while under the influence of pleasure, as Saint Mitrophanes interprets.
Sometimes a man's inward disposition passes into a name for him. Thus the Lord said to Peter: "Get behind Me, Satan; you are a stumbling block to Me, for you do not mind the things of God, but the things of men" (Mt 16:23).
This means fleshly men and lovers of life, who love the things of this world.