Shared ground
Paul is describing a decisive shift in how “we” size people up. Because of what God has done through Christ (the surrounding context in 2 Corinthians 5:14–15), “from now on” they refuse to evaluate anyone “according to the flesh” (v.16). That phrase points to merely human, outward, status-shaped ways of assessment—what can be seen, admired, or dismissed by ordinary social measures.
Paul includes Christ in this change. There was a “before” when “we” assessed Christ in a flesh-based way, and a “now” when that is no longer the case (v.16). The passage then states a broad principle: if anyone is “in Christ,” that person is “a new creation”; “the old” has passed and “the new” has come (v.17). These are explicit claims of a new reality and a break with what came before.
Where interpretation differs
One main question is how wide the “new creation” claim reaches. Some read v.17 mainly as a description of personal transformation: a person in Christ has a genuinely new identity and life-pattern, so “old things” refers to former values, loyalties, and ways of living.
Others think Paul is also placing individuals inside a larger renewed reality: “new creation” echoes the idea of God beginning a world-renewal through Christ, so “old things” can include the old order of status rankings and “flesh-based” evaluation that shaped community life.
A related question is what Paul means by having once known Christ “according to the flesh.” Some take it as Paul admitting a purely human assessment of Jesus (for example, judging by ordinary expectations or by the shame of the cross). Others think it includes a time-bound, pre-resurrection way of knowing Christ—knowing about him in a merely historical or earthly frame—now replaced by knowing him in light of his resurrection and present lordship.
Why the disagreement exists
Paul’s phrases are short and dense (“according to the flesh,” “in Christ,” “new creation”), and they can carry more than one layer at once. The immediate context pushes toward a community-wide reset in evaluation (v.16), while the wording of v.17 can sound like a focused statement about an individual’s new identity. Interpreters weigh those signals differently.
What this passage clearly contributes
This text links Christ’s death and resurrection to a new standard for judging people (v.16) and to a new reality for those who are “in Christ” (v.17). Explicitly, it says the old has passed and the new has arrived for the person in Christ. By inference, it supports the idea that Christian identity is not grounded in surface measures of worth or status, but in God’s act of making people new in relation to Christ (compare the reconciliation theme that follows in 2 Corinthians 5:18–19).