12:33-37 Men's language discovers what country they are of, likewise what manner of spirit they are of. The heart is the fountain, words are the streams. A troubled fountain, and a corrupt spring, must send forth muddy and unpleasant streams. Nothing but the salt of grace, cast into the spring, will heal the waters, season the speech, and purify the corrupt communication. An evil man has an evil treasure in his heart, and out of it brings forth evil things. Lusts and corruptions, dwelling and reigning in the heart, are an evil treasure, out of which the sinner brings forth bad words and actions, to dishonour God, and hurt others. Let us keep constant watch over ourselves, that we may speak words agreeable to the Christian character.

35. A good man, out of the good treasure of the heart, bringeth forth good things—or, "putteth forth good things":

and an evil man, out of the evil treasure, bringeth forth evil things—or "putteth forth evil things." The word "putteth" indicates the spontaneity of what comes from the heart; for it is out of the abundance of the heart that the mouth speaketh. We have here a new application of a former saying (see on [1282]Mt 7:16-20). Here, the sentiment is, "There are but two kingdoms, interests, parties—with the proper workings of each: If I promote the one, I cannot belong to the other; but they that set themselves in wilful opposition to the kingdom of light openly proclaim to what other kingdom they belong. As for you, in what ye have now uttered, ye have but revealed the venomous malignity of your hearts."