What does Isaiah 60:21 teach about God's people?

In Isaiah 60:21, the promise that 'Thy people also shall be all righteous' reveals God's intention for His people to be completely justified in Christ. This verse reflects the transformative power of God's grace, assuring believers that they are counted righteous because of their union with Christ. The context of this passage emphasizes the blessings bestowed upon Zion, God's chosen people, highlighting the fulfillment of His righteous plan in Christ. The assurance found in this promise serves to encourage believers in their faith and motivate them towards holiness.