How do we know that God's promises in Isaiah are true?

The trustworthiness of God's promises, as foretold through prophets like Isaiah, is anchored in their ultimate fulfillment in Jesus Christ. Isaiah prophesied the coming of a savior who would bring victory over death and wipe away tears, which was fully realized in the death and resurrection of Christ. Historical events, including the destruction and subsequent rebuilding of the Temple, serve to highlight God's faithfulness through history, culminating in the redemptive work of Christ as the anticipated Messiah, validating the truth of Isaiah's words and the hope they offer to believers.