(12) Can the fig-tree, my brethren, bear olive berries? either a vine, figs?--Read, Can a fig-tree bear olives, or a vine, figs? The inquiry sounds like a memory of our Lord's, "Do men gather grapes of thorns, or figs of thistles?" (Matthew 7:16.)

So can no fountain . . .--This, the last clause of the sentence above in the Authorised version is very confused in the original, but seems to be merely this, Neither can salt (water) bring forth fresh; or, as Wordsworth renders it, Nor can water that is salt produce what is sweet. And such in effect is Alford's comment: "If the mouth emit cursing, thereby making itself a brackish spring, it cannot to any purpose also emit the sweet stream of praise and good words; if it appear to do so, all must be hypocrisy and mere seeming." Every blessing is, in fact, tainted by the tongue which has uttered curses; and even "Praise is not seemly in the mouth of a sinner" (Ecclesiasticus 15:9).

3:1-12 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.Can the fig tree, my brethren, bear olive berries?.... Every tree bears fruit, according to its kind; a fig tree produces figs, and an olive tree olive berries; a fig tree does not produce olive berries, or an olive tree figs; and neither of them both:

either a vine, figs? or fig trees, grapes; or either of them, figs and grapes:

so can no fountain both yield salt water and fresh. The Alexandrian copy reads, "neither can the salt water yield sweet water"; that is, the sea cannot yield sweet or fresh water: the Syriac version renders it, "neither can salt water be made sweet": but naturalists say, it may be made sweet, by being strained through sand: the design of these similes is to observe how absurd a thing it is that a man should both bless and curse with his tongue.