Приповісті 18:4

4 Deep waters are the words from a man's mouth, A bubbling brook, a fountain of wisdom. Earlier, we added to hominis the supplement sc. sapientis, but then an unnecessary word would be used, and that which is necessary omitted. Rather it might be said that אישׁ is meant in an ideal sense; but thus meant, אישׁ, like גּבר, denotes the valiant man, but not man as he ought to be, or the man of honour; and besides, a man may be a man of honour without there being said of him what this proverb expresses. Ewald comes nearer the case when he translates, "deep waters are the heart-words of many." Heart-words - what an unbiblical expression! The lxx, which translates λόγος ἐν καρδίᾳ, has not read דברי לב, but דבר בלב (as Pro 20:5, עצה בלב־). But that "of many" is certainly not a right translation, yet right in so far as אישׁ (as at Pro 12:14) is thought of as made prominent: the proverb expresses, in accordance with the form of narrative proverbs which present an example, what occurs in actual life, and is observed. Three different things are said of the words from a man's mouth: they are deep waters, for their meaning does not lie on the surface, but can be perceived only by penetrating into the secret motives and aims of him who speaks; they are a bubbling brook, which freshly and powerfully gushes forth to him who feels this flow of words, for in this brook there never fails an always new gush of living water; it is a fountain or well of wisdom, from which wisdom flows forth, and whence wisdom is to be drawn. Hitzig supposes that the distich is antithetic; מים עמקּים, or rather מי מעמקּים, "waters of the deep," are cistern waters; on the contrary, "a welling brook is a fountain of wisdom." But עמק means deep, not deepened, and deep water is the contrast of shallow water; a…

The similitudes here seem to be elegantly transposed. 1. The well-spring of wisdom is as deep waters. An intelligent knowing man has in him a good treasure of useful things, which furnishes him with something to say upon all occasions that is pertinent and profitable. This is as deep waters, which make no noise, but never run dry. 2. The words of such a man's mouth are as a flowing brook. What he sees cause to speak flows naturally from him and with a great deal of ease, and freedom, and natural fluency; it is clean and fresh, it is cleansing and refreshing; from his deep waters there flows what there is occasion for, to water those about him, as the brooks do the low grounds.

18:4 Words flow from one’s character as water bubbles up from the earth (see also 10:20; 12:23; 16:23; cp. Jas 3:10-12).