James 3:8

no man--literally, "no one of men": neither can a man control his neighbor's, nor even his own tongue. Hence the truth of Jam 3:2 appears. unruly evil--The Greek, implies that it is at once restless and incapable of restraint. Nay, though nature has hedged it in with a double barrier of the lips and teeth, it bursts from its barriers to assail and ruin men [ESTIUS]. deadly--literally, "death-bearing."

The apostle here reproves ambition, and an arrogant magisterial tongue; and shows the duty and advantage of bridling it because of its power to do mischief. Those who profess religion ought especially to govern their tongues (Jam 3:1-12). True wisdom makes men meek, and avoiders of strife and envy: and hereby it may easily be distinguished from a wisdom that is earthly and hypocritical (Jam 3:13 to the end).

3:8 no one can tame the tongue: The tongue has an astonishing capacity for committing evil. If its evil is motivated by hell (3:6), it certainly cannot be tamed by mere human effort. • full of deadly poison: This might allude to the serpent in the Garden of Eden (Gen 3:1), who is identified with the devil (Rev 20:2).