By saying he forgets what lies behind, Paul means that he forgets
his past failures and accomplishments; or
what he has achieved throughout his apostolic ministry.
Paul uses the athletic imagery of a runner to explain that he forgets what is behind and strains toward what’s ahead, implying that his sole focus is fulfilling God’s purpose for his life until he wins the crown of salvation. So what are the things that Paul forgets and leaves behind?
Most likely he is referring to his past sins along with his accomplishments as an apostle. In other words, he is saying that in general, he does not linger on the sins of his past or the things he has achieved through the grace of God. Instead, he continually strives forward toward the upward call of God. We can deduce that what Paul leaves behind is his sinful life and accomplishments as an apostle because the immediate context suggests this. We know from Philippians 3:4–8 that he reflects on his past life as a Pharisee and Torah observer, who persecuted the church, but now considers these things as refuse compared to knowing Christ. Further, in Philippians 3:9–12 he explains what it means to him to know Christ, and share in his sufferings, but that he has not yet obtained these things. Finally, Paul summarizes his thought process in Philippians 3:13 when he says he forgets what is behind and strains toward what is ahead. In other words, Paul does not focus on his past sins or accomplishments but strives toward salvation.
Some think that when Paul refers to forgetting his past, he has in mind not his sinful past, but only his apostolic accomplishments. The argument here is that the immediate context has to do with Paul’s reflecting on his striving to know Christ, and the fact that he is not yet attained this. Further, Paul uses athletic imagery in other passages where he has his apostolic ministry in mind. Therefore, when Paul says he forgets what is behind, he forgets his accomplishments.
The problem with this view is that it is not clear that the immediate context should be limited to Philippians 3:9–12, where Paul discusses knowing Christ and not yet obtaining all this. Rather, arguably the context that is related to what Paul leaves behind begins with his life as a Pharisee and persecutor of the church. Second, it is not the case that Paul only uses athletic imagery in conjunction with his apostolic service. In fact, he uses it in 1 Corinthians 9:24–26 to encourage the Corinthians to be self-controlled. And he uses it in Philippians 3:13 to motivate those who are mature in the faith to be like-minded.
Thus, when Paul says that he forgets what lies behind, he has in mind his past sins and accomplishments, as he focuses on his upward call in Jesus Christ.
Interpretation 1:
Paul means that he forgets his past failures and accomplishments.
Summary:
Paul zealously followed the law and persecuted the church. Since his conversion, he considers his past life as a Pharisee refuse, and strains to know Christ by any means possible. Even so, Paul does not dwell on his past sins, or what he has achieved as an apostle, but strains forward, serving God with all his strength.
The Christian is one who looks ahead to the hope of glory. Thus, because of the sacrifice of Christ we can forget our past sins, and because we are his servants, neither do we dwell on our spiritual accomplishments. Rather, we leave the past behind us and fix our eyes on our final hope in Christ.
Advocates:
Gordon Fee
Moisés Silva
Bonnie Thurston
Minor differences:
The common element in our authors is that Paul leaves behind his past failures before conversion. Gordon Fee focuses on the notion that Paul leaves behind his obsession with Torah observance,1 while Bonnie Thurston says that Paul forgets everything described in Philippians 3:7–9.2 Moisés Silva’s view is slightly more nuanced, suggesting that Paul does not look back on either his failures or his successes.3
Arguments
Possible weaknesses
Interpretation 2:
Paul means that he forgets what he has achieved throughout his apostolic ministry.
Summary:
Although Paul has partially attained the knowledge of Christ, he has not achieved this fully. Thus, Paul forgets his apostolic accomplishments so that he would not be distracted by his past success, and simply strains forward toward that day when he might fully know Christ.
Advocates:
Walter Hansen
Peter O’Brien
Frank Thielman
Marvin Vincent
Minor differences:
Our authors agree that when Paul says he forgets what is behind, what is behind
is his accomplishments as an apostle. There is little difference between our authors.
Arguments
Possible weaknesses
13 Brothers, I do not consider that I have made it my own. But one thing I do: forgetting what lies behind and straining forward to what lies ahead,