Proverbs 26:23, “Burning lips and a wicked heart are like a potsherd covered with silver dross.”
Clay has been used for centuries; its earliest known origin is believed to be from the Hittite Civilization around 1400-1200 BC. The results and purpose of the vessel depend upon the type of clay used. Clay starts as a muddy lump that must be formed into the object desired. It is hardened either by sun or by firing; and once the clay has hardened, it can be used for many purposes but it remains a clay pot. Even if it is covered in a beautiful glaze with vibrant colors, it is still a clay pot. A clay pot can be put to many uses, both practical and decorative but it remains a clay pot. There is no chance to change that clay pot to fine gold or silver.
The smooth words of a lying heart are likened to a glazed clay pot. The words may be useful for the moment, but when put to the test of truth; they will not minister or heal. They are simply flattering words to cover the lying heart; they are words of clay covered to resemble fine gold or silver.
Let us remember as followers of Christ, there is no place for lying hearts; we are to speak in truth and walk in the newness of life.