
15 A soft answer turneth away wrath: but grievous words stir up anger.
2 The tongue of the wise useth knowledge aright: but the mouth of fools poureth out foolishness.
4 A wholesome tongue is a tree of life: but perverseness therein is a breach in the spirit.
5 A fool despiseth his father's instruction: but he that regardeth reproof is prudent.
7 The lips of the wise disperse knowledge: but the heart of the foolish doeth not so.
10 Correction is grievous unto him that forsaketh the way: and he that hateth reproof shall die.
12 A scorner loveth not one that reproveth him: neither will he go unto the wise.
18 A wrathful man stirreth up strife: but he that is slow to anger appeaseth strife.
22 Without counsel purposes are disappointed: but in the multitude of counsellors they are established.
23 A man hath joy by the answer of his mouth: and a word spoken in due season, how good is it!
24 The way of life is above to the wise, that he may depart from hell beneath.
26 The thoughts of the wicked are an abomination to the Lord: but the words of the pure are pleasant words.
31 The ear that heareth the reproof of life abideth among the wise.
32 He that refuseth instruction despiseth his own soul: but he that heareth reproof getteth understanding.
I think these sayings suggest that the Bible advises that speech is capable of powerful social influences for either adverse or beneficial effects in relationships and society. They suggest that wisdom, care and responsibility in speech is important and valuable.