God tests faith by the tongue. Teachers have a great responsibility. The tongue is the index to the body. The tongue is a little member, but it needs to be controlled. The uncontrolled tongue is a forest fire, a world of iniquity, and it is set on fire of hell. Animals can be tamed — but not the tongue. The tongue is capable of praising God or blaspheming Him. The tongue lifts man above the animal world. Man can communicate with man and with God. Man can be two-faced, double-minded, and a liar; that is, he can say good and bad. No fountain gives forth sweet and bitter water, nor does a tree bear figs and olives. The tongue reveals genuine faith. Strife and bitterness are not the fruits of faith. An uncontrolled tongue produces envying and strife, which lead to confusion and evil work. True wisdom comes from above and produces fruit: purity, peaceableness, and gentleness. These things are the fruits of faith.