Thomas Aquinas

160. Second, he seeks judgment; and he asks two things. First, whether he had sinned from negligence; hence he says: what is there that I ought to do more, beyond what has been said? O my people, what have I done to you, or in what have I molested you? Answer you me (Mic 6:3). Second, whether he had sinned in the cultivation of the vineyard from excessive care; hence he says: perhaps I seem to have done contrary to what was due in that I looked, tending it well, that it should bring forth grapes, and it has brought forth wild grapes? …

Commentary on Isaiah ↗