A soft tongue - Winning and gentle speech does what it seems at first least capable of doing; it overcomes obstacles which are as bones that the strongest jaws would fail to crush.

A soft tongue breaketh the bone - This is similar to another proverb on the same subject: "A soft answer turneth away wrath." An angry word does nothing but mischief.

By long (l) forbearing is a prince persuaded, and a soft tongue breaketh the (m) bone.
(l) By not creating opportunity to provoke him further.
(m) That is, the heart that is bent to anger, as in (Proverbs 15:1).

By long forbearing is a prince persuaded,.... To come into measures, and do that which his council and ministry advise him to, and to which he may seem at first very averse; but by a mild and gentle representation of things, by an humble submission of them to him, and by frequent remonstrances and patient waiting, his mind is softened, bent, and inclined to take their advice, and pursue the measures suggested to him; which, had they been pressed with heat, haughtiness, and haste, would have been rejected;
and a soft tongue breaketh the bone; or "hardness", as the Vulgate Latin version renders it; soft words, or words delivered in soft language, remove hardness and roughness from the minds of men; and work upon, influence, and bend men, whose wills are obstinate and stubborn, and make them pliable and tractable: so David, with a soft tongue, wrought upon Saul, his enemy; and Abigail, by her soft language, turned the mind of David, who was bent upon the destruction of Nabal, 1-Samuel 24:16; see Proverbs 15:1. Jarchi interprets this soft tongue of prayer and supplication, by which severe things against sinners are removed from them; and so he understands the former clause of the forbearance of God, which gives encouragement to sinners, to persuade him in their favour by repentance and prayer; see Matthew 18:26.

Be patient to bear a present hurt. Be mild to speak without passion; for persuasive language is the most effectual to prevail over the hardened mind.

Gentleness and kindness overcome the most powerful and obstinate.
long forbearing--or, "slowness to anger" (Proverbs 14:29; Proverbs 15:18).

Three proverbs follow, which have this in common, that they exhort to moderation:
15 By forbearance is a judge won over,
And a gentle tongue breaketh the bone.
קצין (vid., Proverbs 6:7) does not denote any kind of distinguished person, but a judge or a person occupying a high official position. And פּתּה does not here mean, to talk over or delude; but, like Jeremiah 20:7, to persuade, to win over, to make favourable to one; for ארך אפּים (vid., Proverbs 14:29) is dispassionate calmness, not breaking out into wrath, which finally makes it manifest that he who has become the object of accusation, suspicion, or of disgrace, is one who nevertheless has right on his side; for indecent, boisterous passion injures even a just cause; while, on the contrary, a quiet, composed, thoughtful behaviour, which is not embarrassed by injustice, either experienced or threatened, in the end secures a decision in our favour. "Patience overcomes" is an old saying. The soft, gentle tongue (cf. רך, Proverbs 15:1) is the opposite of a passionate, sharp, coarse one, which only the more increases the resistance which it seeks to overcome. "Patience," says a German proverb, "breaks iron;" another says, "Patience is stronger than a diamond." So here: a gentle tongue breaketh the bone (גּרם = עצם, as at Proverbs 17:22), it softens and breaks to pieces that which is hardest. Sudden anger makes the evil still worse; long-suffering, on the contrary, operates convincingly; cutting, immoderate language, embitters and drives away; gentle words, on the contrary, persuade, if not immediately, yet by this, that they remain as it were unchangeable.

Forbearing - By patient submission and expectation. Breaketh - Softens the hardest heart.