Joyce Meyer consider all believers in Christian faith are 'teachers in some way or another', because although they don't quote Bible verses or say spiritual things, their behavior becomes a tool to 'teach by example', teaching people around them about Christianity without realizing it, and can do more harm than good if they fail to behave as Christians.
Verse 5
The danger of the human tongue is a popular theme in Jewish wisdom tradition, with many warnings placed in the Book of Proverbs, as well as in Wisdom 1:11; Sirach 5:13; 19:16; 25:8b; 28:17-18, 22, and in rabbinical literature. Several scrolls from Qumran also contain similar advice, such as 1QS 10:21-24; 4Q525 2 ii 1; 14 ii 25-27; and 4Q436 1 i 7-10.
Verse 6
"The tongue is a fire": Fire can be very useful to warm and comfort when used properly, and so is the tongue in conversation and ministry of the word. However, as fire should be carefully controlled, so should Christians be careful that they don't sin with their tongue and always keep their lips from speaking evil. Fire can kindle and rise up into a flame, like angry, passionate words can stir up the flame of lust, anger, envy, and revenge, also spreading when lies, scandal, and evil reports vented by the tongue; and as fire devours all that comes in its way, such are the words of an evil tongue; and therefore are called devouring words they devour the good names of men, corrupt their good manners, and destroy those who make use of them; and what wood is to fire, and coals to burning coals, that are whisperers, tale bearers, backbiters, and contentious persons to strife,
"A world of iniquity": points to the world which is full of sin, for it lies in wickedness, so is the tongue full of iniquity, existing as a world of its own. The Jewish commentaries state that one who uses an evil tongue multiplies transgression, and that it is equal to idolatry, adultery, and murder, and the cause of all sin, as expressed using the fable, as follows:
The Syriac version renders this clause as "and the world of iniquity is as wood", referring to a branch of a tree, in the sense that the tongue is fire, and the wicked world is fuel to it.
"The course of nature": or "wheel of nature", that is, the natural body, where there is a continual rotation or circulation of the blood, by which it is supported. This is the wheel broken at the cistern at death, in or the course of a man's life and actions, even of all generations, which greatly influenced by the tongue; as the Syriac version renders, "and sets on fire the series of our genealogies, or our generations, which run like wheels".
"Set on fire by hell": that is, by the devil as its habitation, in contrast to the "heaven" as the dwelling of God, and the sense is, that the tongue is influenced and instigated by Satan to speak many evil things, and later be set on fire in hell, as the tongue of the rich man in Luke 16:24, as implied in the Talmud:
