The sermon explores the tension between grace and obedience in the Christian life, warning against two common errors: complacency due to grace and the other extreme where we engage in legalism to ensure obedience. It emphasizes that true union with Christ transforms believers, leading them to joyful obedience out of gratitude, not fear. Using Paul's example in 2 Timothy 4, the sermon highlights that perseverance in faith is a result of God's grace, not human merit. Although Scripture speaks of rewards, these are not earned but are gifts from Christ, recognizing His work in and through His people. Christ is crowing his works that he works in us.  Ultimately, believers are called to rest in Christ's finished work while pursuing faithful obedience out of gratitude, motivated by grace and empowered by the Spirit.