James 3:5

III. We are taught to dread an unruly tongue as one of the greatest and most pernicious evils. It is compared to a little fire placed among a great deal of combustible matter, which soon raises a flame and consumes all before it: Behold, how great a matter a little fire kindleth! And the tongue is a fire, a world of iniquity, etc., v. 5, 6. There is such an abundance of sin in the tongue that it may be called a world of iniquity. How many defilements does it occasion! How many and dreadful flames does it kindle! So is the tongue among the members that it defileth the whole body. Observe hence, There is a great pollution and defilement in sins of the tongue. Defiling passions are kindled, vented, and cherished by this unruly member. And the whole body is often drawn into sin and guilt by the tongue. Therefore Solomon says, Suffer not thy mouth to cause thy flesh to sin, Eccles 5 6. The snares into which men are sometimes led by the tongue are insufferable to themselves and destructive of others. It setteth on fire the course of nature. The affairs of mankind and of societies are often thrown into confusion, and all is on a flame, by the tongues of men. Some read it, all our generations are set on fire by the tongue. There is no age of the world, nor any condition of life, private or public, but will afford examples of this. And it is set on fire of hell. Observe hence, Hell has more to do in promoting of fire of the tongue than men are generally aware of. It is from some diabolical designs, that men's tongues are inflamed. The devil is expressly called a liar, a murderer, an accuser of the brethren; and, whenever men's tongues are employed in any of these ways, they are set on fire of hell. The Holy Ghost indeed once descended in cloven tongues as of fire, Acts 2. And, where the tongue is thus guided and wrought upon by a fire from heaven, there it kindleth good thoughts, holy affections, and ardent devotions. But when it is set on fire of hell, as in all undue heats it is, there it is mischievous, producing rage and hatred, and those things which serve the purposes of the devil. As therefore you would dread fires and flames, you should dread contentions, revilings, slanders, lies, and every thing that would kindle the fire of wrath in your own spirit or in the spirits of others. But,

The tongue is indeed a little member, yet doth great things:[2] causeth great evils and mischiefs, when it is not carefully governed; as a little fire,[3] it kindleth and consumeth a great wood. It is a world of iniquity, the cause of infinite evils, dissensions, quarrels, seditions, wars, &c. It defileth the whole body, even the body politic of kingdoms. This fire, kindled by hell, sets all in a flame during the course of our lives, (literally, the wheel of our nativity ) from our cradle to our grave. (Witham)

Verses 1-12 We are taught to dread an unruly tongue, as one of the greatest evils. The affairs of mankind are thrown into confusion by the tongues of men. Every age of the world, and every condition of life, private or public, affords examples of this. Hell has more to do in promoting the fire of the tongue than men generally think; and whenever men's tongues are employed in sinful ways, they are set on fire of hell. No man can tame the tongue without Divine grace and assistance. The apostle does not represent it as impossible, but as extremely difficult. Other sins decay with age, this many times gets worse; we grow more froward and fretful, as natural strength decays, and the days come on in which we have no pleasure. When other sins are tamed and subdued by the infirmities of age, the spirit often grows more tart, nature being drawn down to the dregs, and the words used become more passionate. That man's tongue confutes itself, which at one time pretends to adore the perfections of God, and to refer all things to him; and at another time condemns even good men, if they do not use the same words and expressions. True religion will not admit of contradictions: how many sins would be prevented, if men would always be consistent! Pious and edifying language is the genuine produce of a sanctified heart; and none who understand Christianity, expect to hear curses, lies, boastings, and revilings from a true believer's mouth, any more than they look for the fruit of one tree from another. But facts prove that more professors succeed in bridling their senses and appetites, than in duly restraining their tongues. Then, depending on Divine grace, let us take heed to bless and curse not; and let us aim to be consistent in our words and actions.