The wise in heart shall be called prudent: and the sweetness of the lips increaseth learning. Understanding [is] a wellspring of life unto him that hath it: but the instruction of fools [is] folly. The heart of the wise teacheth his mouth, and addeth learning to his lips. Pleasant words [are as] an honeycomb, sweet to the soul, and health to the bones. (Proverbs 16:21-24)
For the SIH devotional on this subject:
Settled In Heaven Blog 