The function of the mouth as the organ of speech is emphasized in the Bible.
The Bible says, “If anyone considers himself religious and yet does not keep a tight reign on his tongue, he deceives himself and his religion is worthless” (Jas 1:26). “The tongue corrupts the whole person…No one can control the tongue. It is a restless evil, full of deadly poison. One minute it is praising God, the next cursing man” (Jas 3:2-12). “It is not what goes into the mouth which makes a person unclean, rather the words that gush forth that makes them unclean” (Mt 15:11).
Would I like what I say to others said to me?
they can wound another’s spirit, especially those of children. Jesus said, we will give account for every careless word spoken (Mt 12:36,37). We need to join with the Psalmist who said, “I’ve purposed my mouth will not transgress” (Ps 17:3).