Shared ground
Paul presents his own life with Christ as unfinished. He explicitly says he has not “obtained” what he is aiming at and is not yet “made perfect” (vv. 12–13). At the same time, he describes sustained effort: he “press[es] on” and uses athletic language (vv. 12, 14). His striving is not pictured as self-generated in isolation, because he grounds it in Christ’s prior action: Christ “laid hold” of him first, and Paul’s pursuit is to “take hold” of what Christ took hold of him for (v. 12).
Paul’s method is also clear: “one thing” dominates his focus—he stops living out of “the things which are behind” and instead reaches forward to “the things which are before” (v. 13). His direction is “toward the goal,” and he describes the outcome as “the prize of the high calling of God in Christ Jesus” (v. 14).
Where interpretation differs
What Paul has not “obtained.” Some read “obtained” and the “prize” as mainly pointing to final resurrection-life and full completion at the end (connected to the hope language just before in 3:10–11). Others think Paul is speaking more broadly about the whole aim of knowing Christ, being shaped into Christ’s likeness, and reaching full maturity—still future in its fullness but also present as an ongoing pursuit.
What “made perfect / fully complete” means here. Some take it as moral perfection (faultless behavior). Others take it as final completion—being fully finished in the sense of reaching the end-point God intends, which includes moral transformation but is not limited to it.
What “forgetting what lies behind” includes. Some understand “behind” as past achievements and status (especially in the immediate context of Paul’s former confidence in credentials). Others think it includes past sins and failures as well. Many readers conclude it can include both, since either pride in achievements or paralysis from failures can keep someone from reaching forward.
Why the disagreement exists
Paul uses compact phrases (“obtained,” “made perfect,” “prize,” “high calling”) without spelling out each referent in these verses. The surrounding context (3:7–11 and 3:15–19) strongly frames the topic as Christ-centered life with an end-point still ahead, but interpreters weigh the immediate athletic imagery and the broader letter’s themes differently when deciding how specific the “prize” is.
What this passage clearly contributes
This paragraph contributes a clear pattern of Christian existence as Paul describes it: (1) not-yet completion is normal even for an advanced apostle (vv. 12–13), (2) persevering pursuit is compatible with that humility (vv. 12, 14), (3) Christ’s initiative (“laid hold of”) stands behind Paul’s effort (“press on,” “take hold”) rather than replacing it (v. 12), and (4) the end-point is defined by God’s call “in Christ Jesus,” not by social honor or self-chosen goals (v. 14).