This sermon unpacks the parable of the prodigal sons in Luke 15, emphasizing that both the younger son who squandered his inheritance and the older son who remained obedient yet resentful are equally lost—neither can earn the father's love. While the younger son's rebellion is evident, the older son's self-righteousness, bitterness, and refusal to rejoice reveal a heart estranged by performance-based religion, mirroring the Pharisees' spiritual pride. The father's lavish love, demonstrated through unconditional grace and persistent pursuit, exposes the futility of trying to merit divine favor through obedience or moral superiority. The story's open ending challenges listeners to confront their own hidden self-justification, calling all—sinners and saints alike—to repent not only of sin but of self-righteousness, and to embrace the unearned, eternal love offered in Christ. Ultimately, true sonship is not earned but received, and joy in God's grace is only possible when we relinquish the illusion of merit.