The book of Isaiah holds sharp warnings for the people of God—not only the ancient people of God but the church today.

587 BC was a disastrous time for the people of Jerusalem and Judah. More than a century earlier the northern tribes of Israel were conquered and carried away by the Assyrians. Now the Babylonians laid waste the southern territories and a seventy-year exile uprooted the nation. Shameful idolatry had caused the undoing of the people. Innumerable warnings incited only an unresponsive disdainfulness; the prophets were considered fools (Hos 9:7). God, who never threatens in vain, allowed the axe to fall (Isa 1:7).^[1]

Isaiah 1:10-18 begins the Prophet’s message, and while seemingly hopeless, a reminder of the Lord’s mercy is assuredly present, for in amazing love, God never abandons his people, though they falter.

The waning people of God hear the words of the Lord through the Prophet Isaiah who calls them to return—return to the Lord and return to worship. In a similar manner, the message subsists today and transcends generations, as the people of God are not called to mere sacrifices but to purity of heart, for without such a condition, God’s people may not rightfully worship and, therefore, may not worship in sincerity. There are three essentials which must be observed from the text.