Whoever guards his mouth and tongue keeps his soul from troubles. (Proverbs 21:23, NKJV)
Our words are the expressions of our soul. The deepest recesses of the heart are exposed by the words of our mouth. Truly, “out of the abundance of the heart the mouth speaks” (Matt. 12:34). For example, guard your mouth against speaking corrupt words. There is no place in the Christian’s life for profanity, for it exposes a profane heart. Guard your mouth against speaking lies. Half-truths, misdirection and other forms of deception are not a trait of the pure in heart. “Let each one of you speak truth with his neighbor” defines the followers of Jesus (Eph. 4:25). Guard your mouth against angry words. These flow out of a heart that is bitter, resentful and unforgiving. Guard your mouth against speaking false doctrine. The Spirit of truth has spoken truth to us through Christ’s apostles (Jno. 16:13). Therefore, speak “as the oracles of God,” not with the wisdom and will of men (1 Pet. 4:11; Col. 2:8). By cleansing your heart of profanity, deceit, anger and error, your soul will be protected from trouble. That’s what repentance is; changing your heart. Rather than opening wide your mouth to pour out evil things, guard your soul from the troublesome results of an uncontrolled tongue. May we recall and live what the children sing, “Be careful little mouths what you say.”
1 And the word of the Lord came to me, saying, 2 “Son of man, prophesy against the prophets of Israel who prophesy, and say to those who prophesy out of their own heart, ‘Hear the word of the Lord!’ ” 3 Thus says the Lord God: “Woe to the foolish prophets, who follow their own spirit and have seen nothing!” (Ezekiel 13:1–3, NKJV)
Does it make a difference what you teach religiously, as long as you are sincere? Yes. Because it makes a different to God, it ought to make a difference to us. It is an insult against God to teach something as being from God, when in fact it only comes one’s own heart (mind or will). It is putting words into His mouth. Such lies against God by the false prophets of Israel were among the sins that led to the nation’s demise at the hands of the Babylonian empire (approximately 600 years before Jesus was born). Even now, more than a few sincere, religious people accept and promote the false teaching that “it doesn’t matter what you believe, as long as you are sincere.” What Bible passage teaches that? Truth is God’s word, not what I choose to define as truth (Jno. 17:17). Only the truth of God that is revealed in the word of Christ will free us from sin. Only by abiding in the word of Christ are we truly His disciples (Jno. 8:31-32). Be sure to speak and obey His teachings, and not the teachings that originate in the human heart. The Scriptures reveal the difference (2 Tim. 3:16-17).