What were Isaiah's messages?

A:

Isaiah's messages, contained in Isaiah chapters 1-39, are called oracles. The kings with whom he associated are those of the last half of the eighth century, and the setting of his work is this period. He was concerned with Assyria as the dominant power. Isaiah preached doom, the proximity of punishment, and the remnant concept.

Chapters 40-55 were added much later and were written by an anonymous author now known as Second Isaiah. Writing towards the end of the Babylonian Exile, his message was that the punishment was past, suffering was over, and deliverance was at hand. Chapters 56-66 is a continuation of Second Isaiah's message, but written by Third Isaiah after the end of the Exile.