Proponents of Once Saved Always Saved theology typically use the following type of logic:
A child cannot become unborn, and the relationship of a father and a child cannot be ended. Once a son, always a son. Therefore, once we are saved we will always be saved. Or as Hal Lindsey wrote:
When you’re born into your earthly family, you may be a winner or a loser in your behavior, but you’re still a member of that family. There’s no way to be unborn just because you don’t measure up to the standards of your family. It’s just the same when you’re born into God’s family. You may be disciplined for wrong behavior, but you won’t be disowned. (The Liberation of Planet Earth, p. 221)
This argument is based on natural fact, then applied to the spiritual, which doesn’t always hold up as truth. (Once Saved Always Saved adherents frequently make this kind of mistake of arguing from the natural to the spiritual.) This type of error can be demonstrated by the following facts: Before we became Christians, we were all “children of the devil” (Acts 13:10; 1 Jn. 3:10) and “sons of the evil one” (Mt. 13:38). In other words, the devil was our spiritual father (Jn. 8:44). However, this spiritual father-child relationship changed at the point of salvation, according to Scripture! Aren’t you glad that spiritual, father-child relationships can be ended?
We are sons of God through faith in Christ Jesus (Gal. 3:26), yet it is possible to stop believing (Lk. 8:13), have our faith destroyed (2 Tim. 2:18) and for our faith to become shipwrecked (1 Tim. 1:19,20).
Also, angels and Adam are called “son(s) of God” (Job 1:6; Lk. 3:38, KJV), yet some angels and Adam lost their eternal life, and we can too as sons of God.
We can’t become unborn, but we can die spiritually (Lk. 15:24,32; Rom. 8:13; Jam. 1:14,15; etc.)! We must endure to the end to be saved (Mt. 10:22).
Finally, Lindsey wrote you won’t be disowned, but Jesus said if we disown him, he will in turn disown us (Mt. 10:33, NIV). Who should we believe?
Excerpt from The Believer’s Conditional Security, Copyright Dan Corner