One major debate within Christian circles is the question of whether or not a Christian can lose his or her salvation. Arminians argue that true believers can sin so much that they lose their faith and perish. Some Christians respond by arguing that once a person professes faith in Jesus, he is eternally secure in his salvation and—even if he commits complete apostasy (“falls away”) and vocally rejects Jesus Christ—will still go to heaven, for “once saved, always saved.” In light of the biblical doctrine of predestination, how should we understand the security we have under God’s care? There have...