“[I]n Paul there is no more important conclusion about the Christian life, nothing about its structure that is more basic than this consideration: the Christian life in its entirety is to be subsumed under the category of resurrection. Pointedly, the Christian life is resurrection life. . . . It is in this light that statements like Galatians 2:20 (‘I no longer live, but Christ lives in me’)—autobiographical, but surely applicable to every Christian—ought to be read.” (Richard B. Gaffin, Jr., By Faith Not By Sight, p. 77).
“This verse is the key verse of the Epistle to the Galatians; it expresses the central thought of the Epistle. The Judaizers attempted to supplement the saving work of Christ by the merit of their own obedience to the law. ‘That,’ says Paul, ‘is impossible; Christ will do everything or nothing: earn your salvation if your obedience to the law is perfect, or else trust wholly to Christ’s completed work; you cannot do both; you cannot combine merit and grace; if justification even in slightest measure is through human merit, then Christ died in vain.’” (Machen’s Notes on Galatians, p. 161).
Quotes from the Reflection for Trinity Presbyterian Church