2 The tongue of the wise useth knowledge aright; but the mouth of the foolish poureth out folly.
A prudent man concealeth knowledge; but the heart of the foolish proclaimeth folly.
Every prudent [man] acteth with knowledge; but the foolish layeth open [his] folly.
The Lord Jehovah hath given me the tongue of the instructed, that I should know how to succour by a word him that is weary. He wakeneth morning by morning, he wakeneth mine ear to hear as the instructed.
{To the chief Musician. Upon Shoshannim. Of the sons of Korah. An instruction; -- a song of the Beloved.} My heart is welling forth [with] a good matter: I say what I have composed touching the king. My tongue is the pen of a ready writer.
A man hath joy by the answer of his mouth; and a word in its season, how good is it!
The heart of the wise maketh his mouth intelligent, and upon his lips increaseth learning.
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Commentary on Proverbs 15 Keil & Delitzsch Commentary
We take these verses together as forming a group which begins with a proverb regarding the good and evil which flows from the tongue, and closes with a proverb regarding the treasure in which blessing is found, and that in which no blessing is found.
Proverbs 15:1
1 A soft answer turneth away wrath,
And a bitter word stirreth up anger.
In the second line, the common word for anger ( אף , from the breathing with the nostrils, Proverbs 14:17) is purposely placed, but in the first, that which denotes anger in the highest degree ( חמה from יחם , cogn. חמם , Arab. hamiya , to glow, like שׁנה from ישׁן ): a mild, gentle word turns away the heat of anger ( excandescentiam ), puts it back, cf. Proverbs 25:15. The Dagesh in רּך follows the rule of the דחיק , i.e. , of the close connection of a word terminating with the accented eh, aah, ah with the following word ( Michlol 63b). The same is the meaning of the Latin proverb:
Frangitur ira gravis
Quando est responsio suavis