Other scriptures on harmful speech?
What other scriptures warn against the dangers of harmful speech like in Psalm 59:7?

Psalm 59:7—A Snapshot of Destructive Speech

“They spew evil from their mouths; sharp words from their lips: ‘For who can hear us?’”


Echoes in Proverbs: Wisdom That Guards the Mouth

Proverbs 10:19 — “When words are many, sin is unavoidable, but he who restrains his lips is wise.”

Proverbs 11:9 — “With his mouth the ungodly destroys his neighbor, but through knowledge the righteous are rescued.”

Proverbs 12:18 — “Speaking rashly is like a piercing sword, but the tongue of the wise brings healing.”

Proverbs 15:4 — “A soothing tongue is a tree of life, but a perverse tongue crushes the spirit.”

Proverbs 18:21 — “Death and life are in the power of the tongue, and those who love it will eat its fruit.”

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


Echoes in the Psalms and Prophets: God’s Repeated Alarm

Psalm 52:2-4 — “Your tongue devises destruction like a sharpened razor, O worker of deceit… You love every word that devours, O deceitful tongue.”

Psalm 64:3 — “They sharpen their tongues like swords and aim bitter words like arrows.”

Psalm 140:3 — “They sharpen their tongues like snakes; the venom of vipers is on their lips.”

Isaiah 59:3-4 — “Your lips have spoken lies, and your tongues mutter injustice…”

Jeremiah 9:8 — “Their tongue is a deadly arrow—it speaks deceit; with his mouth one speaks peace to his neighbor, but in his heart he sets an ambush.”


New Testament Exhortations: The Tongue Under Christ’s Lordship

Matthew 12:36-37 — “I tell you that men will give an account on the day of judgment for every careless word they have spoken.”

Ephesians 4:29 — “Let no unwholesome talk come out of your mouths, but only what is helpful for building up the one in need and bringing grace to those who listen.”

Colossians 3:8 — “But now you must put away all such things: anger, rage, malice, slander, and filthy language from your mouth.”

Colossians 4:6 — “Let your speech always be gracious, seasoned with salt, so that you may know how to answer everyone.”

James 1:19 — “Everyone should be quick to listen, slow to speak, and slow to anger.”

James 1:26 — “If anyone considers himself religious and yet does not bridle his tongue, he deceives his heart and his religion is worthless.”

James 3:5-10 — “The tongue is a small part of the body… a restless evil, full of deadly poison.”

1 Peter 3:10 — “Whoever would love life and see good days must keep his tongue from evil and his lips from deceitful speech.”


Putting It All Together: Themes We Can’t Miss

• God’s word is true in every line, so these cautions are literal and binding.

• Harmful speech is portrayed as a weapon—razor, sword, arrow, deadly poison.

• The tongue exposes the heart; restraining it demonstrates wisdom and godliness.

• Unchecked words invite judgment; wholesome words dispense grace and life.

• In Christ, believers are called to purposeful, gracious, truth-filled speech that reflects the character of the One who never spoke deceit.

How can we guard our tongues according to biblical principles in Psalm 59:7?
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