Jeremiah 9:23-24 redirects glory from human strength to knowing God's kindness and righteousness. David's spiritual evolution—from self-focused righteousness in Psalm 18 to dependent mercy in Psalm 51—illustrates this shift. True kingdom citizenship, affirmed in Matthew 25, is marked by serving others, while Jeremiah 7-11 warns against the stagnation of self-reliance. Grace and the kingdom are inseparable; though complex, the divine plan unfolds through simple, progressive faith. Ultimately, Christ's work culminates in delivering a perfected kingdom to the Father, destroying death and establishing eternal righteousness, a magnificent plan in which God's people currently play a vital role.