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Proverbs 1:5
let the wise listen and gain instruction, and the discerning acquire wise counsel--

Proverbs 9:9
Instruct a wise man, and he will be wiser still; teach a righteous man, and he will increase his learning.

Proverbs 18:1, 15
He who isolates himself pursues selfish desires; he rebels against all sound judgment. . . .

Proverbs 19:8
He who acquires wisdom loves himself; one who safeguards understanding will find success.

Matthew 12:35
The good man brings good things out of his good store of treasure, and the evil man brings evil things out of his evil store of treasure.

Matthew 13:44, 52
The kingdom of heaven is like treasure hidden in a field. When a man found it, he hid it again, and in his joy he went and sold all he had and bought that field. . . .

2 Corinthians 4:6, 7
For God, who said, "Let light shine out of darkness, " made His light shine in our hearts to give us the light of the knowledge of the glory of God in the face of Jesus Christ. . . .

the mouth

Proverbs 10:8, 10
A wise heart will receive commandments, but foolish lips will come to ruin. . . .

Proverbs 13:3
He who guards his mouth protects his life, but the one who opens his lips invites his own ruin.

Proverbs 18:7
A fool's mouth is his ruin, and his lips are a snare to his soul.

Proverbs 21:23
He who guards his mouth and tongue keeps his soul from distress.