It’s a classic case of stagecraft — a sleight of hand for the personality. I speak of chaos that masquerades as order—the learned ability to pass effortlessly from darkness to light; gossip to glory; division to the divine. Out of the same mouth both blessings and cursings, these things should not be!
“How can ye, being evil, speak good things? For out of the abundance of the heart the mouth speaketh?” This is not to imply that evil hearts cannot proclaim good things, but rather, if evil hearts speak good things, it is a matter of performance, strategy, or occasion.
Fresh waters cannot flow from bitter waters.
What flows consistently reveals what is truly present.
Out of the abundance (Gk. overflow) the mouth speaketh.
The key is overflow, not utterance.
If they utter holiness on Sunday but the overflow in the week is gossip, division, or corrupt communication, you know what the waters are.
Discern, not the utterance of occasion, but the overflow.