Does a believer receive all of God's grace at salvation or only part of it?
At salvation, every believer experiences all of God's grace, not merely a portion. The moment a person believes, all of God's grace has been poured out on them. Growth follows from that position in grace, as believers grow in grace rather than growing into grace.
Les explains that even infant believers cannot be expected to suddenly be mature or to have the same spiritual discoveries as older Christians. Those saved out of paganism, idolatry, and immorality need a time of nurturing and growth, but only by the grace of God. His main point is that every last person saved by the grace of God at salvation experiences all of God's grace. All of God's grace is experienced the moment we believe, though we still have a long way to go in our growth. So what do we do? Peter puts it aptly: grow in grace. We grow in grace; we do not grow into grace. You do not just begin to grow and then finally appropriate the grace of God. All of God's grace has been poured out on us the moment we believe, and from that position in grace we grow and grow and grow, if we do as God intends. But grace is not law, and since we are under grace and not under law, nothing is forced upon us.