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.
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.
The piety of Abigail, like the fragrance of a flower, breathed out all unconsciously in face and word and action. The Spirit of the Son of God was abiding in her soul. Her heart was full of purity, and gentleness, and sanctified love. Her speech, seasoned with grace, and full of kindness and peace, shed a heavenly influence. Better impulses came to David, and he trembled as he thought what might have been the consequences of his rash purpose. An entire household would have been slain, containing more than one precious, God-fearing person like Abigail, who had engaged in the blessed ministry of good. Her words healed the sore and bruised heart of David. RC 333.2
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