Proverbs 15:2

ESV The tongue of the wise commends knowledge, but the mouths of fools pour out folly.
NIV The tongue of the wise adorns knowledge, but the mouth of the fool gushes folly.
NASB The tongue of the wise makes knowledge pleasant, But the mouth of fools spouts foolishness.
CSB The tongue of the wise makes knowledge attractive, but the mouth of fools blurts out foolishness.
NLT The tongue of the wise makes knowledge appealing, but the mouth of a fool belches out foolishness.
KJV The tongue of the wise useth knowledge aright: but the mouth of fools poureth out foolishness.

What does Proverbs 15:2 mean?

Addressing the subject of speech in this verse, Solomon observes that the wise person compliments knowledge by speaking wisely. Wise speech persuades others to pursue and gain knowledge. Likewise, the thoughtful person is focused on concepts such as truth and wisdom, rather than merely filling the air with words. The fool, however, speaks foolishly. Words gush out of their mouths thoughtlessly and reveal a lack of knowledge. Critics of Christian faith often rely on volume—both in the sense of bulk and noise—instead of reason. Through a flood of repeated criticisms, angry words, and shallow attacks, they seek to avoid deeper engagement on subjects.

Jesus, who possessed all the treasures of wisdom and knowledge (Colossians 2:3), astounded people with His wise words. Even at the age of twelve Jesus manifested wisdom when He conversed with the teachers in the temple. Luke 2:47 reports that "all who heard him were amazed at his understanding and his answers." In the synagogue in Nazareth, Jesus' hometown, Jesus taught those who were present. Subsequently, those who heard Him, "were astonished, and said, 'Where did this man get this wisdom and these mighty works?'" (Matthew 13:54).

Christ also taught His disciples to pray wisely instead of using empty words. He said, "When you pray, do not heap up empty phrases as the Gentiles do, for they think that they will be heard for their many words. Do not be like them, for your Father knows what you need before you ask him" (Matthew 6:7–8).
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