God's word tells us about that:
1 An unfriendly man pursues selfish ends; he defies all sound judgment. 2 A fool finds no pleasure in understanding but delights in airing his own opinions. 3 When wickedness comes, so does contempt, and with shame comes disgrace. 4 The words of a man's mouth are deep waters, but the fountain of wisdom is a bubbling brook. 5 It is not good to be partial to the wicked or to deprive the innocent of justice. 6 A fool's lips bring him strife, and his mouth invites a beating. 7 A fool's mouth is his undoing, and his lips are a snare to his soul. 8 The words of a gossip are like choice morsels; they go down to a man's inmost parts. 9 One who is slack in his work is brother to one who destroys.