In today's teaching, Pastor Joel covers the closing verses of 1 Thessalonians, focusing on God's faithful promise to completely sanctify believers. He emphasizes that sanctification is God's work, not ours, distinguishing between justification (being made right with God), sanctification (the ongoing process of becoming holy), and glorification (our final transformation when Christ returns). While believers cannot produce righteousness in themselves, they can position themselves through spiritual disciplines and community to receive God's sanctifying work. The message offers hope to struggling believers that despite present failures, God who began the work will faithfully complete it at Christ's return, presenting us blameless before Him.