Shared ground
Paul treats God’s “promises” as something the Corinthians already “have,” and he uses those promises as the reason for a moral conclusion (explicit). The action he names is communal and shared (“let us cleanse ourselves”), not merely individual self-improvement (explicit). The cleansing is meant to be comprehensive (“all defilement”) and it concerns both outward life (“flesh”) and inward life (“spirit”) (explicit). The direction is ongoing—“perfecting holiness”—so holiness is presented as something to be brought toward fuller expression (explicit). The controlling posture is “the fear of God,” meaning a serious, God-aware reverence shaping conduct (explicit).
Where interpretation differs
What “these promises” refers to. Some read Paul as pointing mainly to the promises he just cited about God dwelling with his people and welcoming them (2 Corinthians 6:16–18). Others think he is also drawing on a wider set of biblical promises, with the immediate quotations serving as a representative sample (inference).
What “defilement of flesh and spirit” includes. Many think “flesh” and “spirit” is a broad way to cover both visible behavior and inner attitudes, so “defilement” includes any moral corruption in either sphere (inference from the paired terms). Others emphasize the setting in Corinth and the preceding call to separation, suggesting Paul has particular contaminating associations in view (such as practices connected to idolatry or immoral social settings), while still using language broad enough to go beyond one issue (inference tied to context).
Why the disagreement exists
Paul gives clear categories (promises, cleansing, defilement, flesh/spirit, holiness, fear of God) but does not list specific practices in this verse. Interpreters therefore lean more on the immediate context (6:16–18) or on broader patterns in the letter and Corinth’s social-religious pressures to fill in concrete details.
What this passage clearly contributes
This verse links God’s promises to ethical transformation: the promises are not only comfort but also the basis for cleansing (explicit). It frames holiness as comprehensive (touching “flesh and spirit”) and progressive (“perfecting”) rather than merely selective or static (explicit). It also locates the pursuit of holiness in “the fear of God,” keeping the focus on reverent accountability to God rather than image-management or group pressure (explicit).
