The sermon centers on the profound motivation for Christian endurance found in Paul's declaration that he suffers for the sake of the elect—those chosen by God's sovereign, unconditional, and immutable grace. Rooted in the truth of divine election, this doctrine is not a source of complacency but a powerful impetus for evangelism and faithful service, as believers recognize themselves as instruments in God's hands to bring others to salvation. The message emphasizes that God's sovereign plan includes human responsibility, making every believer a vital means through which God's glory is vindicated in the world. Ultimately, the purpose of life is to glorify God and find supreme delight in Him, which fuels both personal endurance and passionate mission, transforming everyday life into worship and service that reflects Christ's greatness to a watching world.