John Chrysostom
Your silver has become tarnished, that is, it has turned into something counterfeit, impure, and unclean. Your wine is mixed with water, as your merchants dilute it. At first, he did not specify their wrongdoing in detail but merely asserted that they had forsaken the Lord and become the progeny of the wicked and the offspring of the lawless. This may have come across more as discernment than as a direct condemnation. However, here he lists their specific transgressions in a more private context, initially highlighting the root of their evils—avarice and the gains of commerce. Some, however, lacking a grasp of the profound wisdom of God, interpret these words in a metaphorical manner.
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They assert that the distinguished prophet Isaiah would not discuss the dishonesty of traders and the corruption of tavern owners, suggesting instead that the silver represents God's messages and the wine signifies the doctrine, which they perverted by infusing their own interpretations. While I do not reject this interpretation, I contend that the former view has greater validity. Addressing such topics is not unbecoming for a prophet; rather, it aligns beautifully with the purpose and humanity of God.
There is little need for extensive elaboration on this point. When the only-begotten Son of God descended to earth with the aim of imparting a lofty doctrine and establishing a divine way of living, He too addressed matters of measure and similar topics, which might appear even less significant—such as greetings, social seating arrangements, and the priority of reclining. These seemingly minor issues, when overlooked, become substantial sources of sin. If such matters warrant attention in the new covenant, they certainly deserved it even more in the old, when the people were less refined, and their lives improved significantly as they learned to avoid all forms of injustice, to refrain from deceiving their neighbors, and not to exacerbate the plight of the poor through harmful indulgences. The negligence of these aspects frequently led to the downfall of cities, the downfall of rulers, and relentless conflict; conversely, adherence to these principles fostered peace, prosperity, and safety, directing individuals toward virtue.
We shall not emulate the false apostles who boast excessively about themselves. This is reflected in the term kaphleusai, which indicates the act of diluting wine or selling what should be offered freely. It seems to me that in this context, he both mocks them in relation to money and hints at their mixing their own with God's teachings, as I previously mentioned. This is Isaiah’s charge: Your merchants mix wine with water (Isaiah 1:22). Should this be said of wine, attributing it to doctrine would not be mistaken. The prophet asserts, we do not do this; instead, we present to you what has been faithfully transmitted to us, offering the pure, undiluted word.