The wisdom of Isaiah: Wash and make yourselves clean. Take your evil deeds out of my sight; stop doing wrong. Isaiah 1:16

The prophet Isaiah was a major prophet of the Old Testament, and he prophesied during the reigns of Uzziah, Jotham, Ahaz, and Hezekiah as kings of Judah. The times in which Isaiah lived were difficult times because the Assyrian empire threatened the entire Middle East, and the kingdoms of Israel and Judah, in order to maintain their independence, relied on diplomacy to survive, something that the prophet severely condemned, because only trust in God could save the chosen people.
Isaiah preached primarily in Judah and Jerusalem and remained loyal to the Davidic dynasty, alternating his role as prophet, as sage, and also as political advisor. Isaiah began his first book by explaining that the Kingdom of Judah was no longer able to perceive the face of God and that its relationship with the supreme realm no longer existed; the ruling class of his country had lost that understanding which comes from wisdom, and he explained this fact with these words: "The ox knows its owner, and the donkey its master's feeding trough, but Israel doesn't know, and my people don't understand" Isaiah 1:3.
Furthermore, the worship of God had been transformed into a merely external worship without that reverential fear required by the Lord, the prophet declared in his book. God, in his eternal and perfect wisdom, rejects everything that is superficial and lacks content. The love of riches, the opposite of the love of God, is a path to nowhere.
It is for all these reasons that Isaiah recalled, but in other words, Psalm 1, the Psalm of the two paths: the righteous are blessed, but the foolish are punished. And so in one of his oracles, the prophet wrote: "Wash and make yourselves clean. Take your evil deeds out of my sight; stop doing wrong" Isaiah 1:16. And then the prophet expressed in his book all that pleases God: "Learn to do good. Seek justice. Help the oppressed. Defend the cause of orphans. Fight for the rights of widows." Isaiah 1:17. Isaiah, with wisdom, called for a spiritual change, to return to the fear of God, which is the beginning of the first and second commandments, and mercy towards one's neighbor, which summarizes the third commandment onwards. Because only in this way could the Kingdom of Judah have a secure future.

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