What is the significance of the remnant mentioned in Isaiah 66?

In Isaiah 66, the remnant refers to those who remain faithful to God amidst widespread unbelief and judgment. This remnant is significant as they are the ones whom God has chosen to carry forth the gospel message to the nations. They symbolize hope and preservation within a faithless generation, serving as instruments of God's grace and mercy. Their role underscores the promise that, despite judgment, God will always maintain a people for Himself who declare His glory and proclaim salvation to those who have not yet heard His fame.