"The words of the reckless pierce like swords, but the tongue of the wise brings healing." Proverbs 12:18 (NIV Bible) "He who guards his mouth and his tongue, Guards his soul from troubles." Proverbs 21:23 (NASB Bible) :)

The most common word to describe someone who talks a lot is "talkative." It is polite and factual. "Loquacious" is more formal or elevated word that means the same thing. "Chatterbox" and "motormouth" express a judgement--they are used for a person who talks too much. The opposite of "talkative" is "taciturn" or simply "quiet." The proverb I like best is "Make sure brain is engaged before putting mouth in gear." (A play on operating a stick-shift car, in which must make sure the clutch is DISengaged before putting the engine in gear. The phrasing of that proverb isn't quite correct grammar--it intentionally resembles the shortened language that might be used on a warning sign).

You probably meant "expressions", not "proverbs" (unless you did prefer some biblical or traditional wisdom). :) Other phrases for a chatterbox include "motormouth" and "someone who can talk the leg off a table (and talk it back on again)."

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