The unsaved man is unable to reflect the treasure of Christ in his speech until he receives Christ as his Savior. The carnal Christian, though saved, often denies the authority of the Word of God. Therefore, he is excluded from speaking in such a manner that would reflect the presence of Christ abiding in his heart. A saved person who does not surrender to the will of God, but follows the desires of his own heart (2) speaks forth the evil that is present within because he is controlled by the sinful, adamic nature.
Luke 6:45b says, “out of the abundance of the heart, the mouth speaketh.” Sooner or later, what is contained in the heart slips out. We have a tendency to speak our minds loosely, glibly and carelessly. The words we speak always reveal our viewpoint or frame of reference. There is a frame of reference that is characteristic of the adamic nature. It is possessed by every human being, whether they acknowledge its presence or not.
The believer in Christ is given the mind of Christ when he is born again. However, he must decide daily to fill the empty rooms of his soul with the treasures of the Word. Otherwise, he will be left under the dominion and control of adamic opinions and patterns of speech.