The call to rejoice and be glad is directed towards those who strive to live righteously and maintain integrity in their hearts. This verse highlights the joy that comes from a life aligned with God's will. Being righteous is not just about following rules but involves a sincere heart that seeks to do what is right and just. The invitation to sing is an expression of the joy and gratitude that naturally flows from experiencing God's presence and blessings.
Living with an upright heart means being honest, sincere, and faithful in one's relationship with God and others. This integrity leads to a deep sense of peace and fulfillment, which is why the verse encourages such joyous expression. It serves as a reminder that true happiness is found not in external circumstances but in a heart that is aligned with divine principles. This joy is a testament to the transformative power of living a life dedicated to God's ways.