"Language is, I maintain, an indispensable element of the image of God in which we are created. (1) It likens us to God, who does all things by His powerful Word and who is identical with His word (John 1:1ff). (2) It distinguishes us from the animals, giving us a powerful tool of dominion. (3) It is central to human life. Man's first experience recorded in Scripture was the experience of hearing God's word (Gen 1:28ff), and his first task was the task of "naming" the animals (Gen. 2:19ff). James, building on Proverbs, teaches us that if a man can control his tongue, he can control his whole body (3:1-12). Sins of the tongue take prominence in biblical lists of sins, such as Romans 3:10-18. Redemption is often presented as a cleansing of the lips (Isa. 6:5-7) or language (Ps. 12; Zeph. 3:9-13).
The points I have been making, then, about the responsible use of theological language, are not merely of academic interest. Speaking truthfully, for edification (rather than speaking lies, blasphemies, and foolishness) is a crucial part of our responsibility before God (I Cor. 14:3, 12, 17, 26; Eph. 4:29)."