Galatians 3:3

Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh?

Begun, [ Enarxamenoi (G1728)] - after having taken the initiatory step in the Christian life (Philippians 1:6), which ought to be the pledge of its completion (cf. Deuteronomy 2:24-5; Deuteronomy 2:31).

In the Spirit - Not merely was Christ crucified 'graphically set forth' in my preaching, but also "the Spirit" confirmed it by unparting His gifts. 'Yet are ye now being made perfect' (Greek) - i:e., seeking to be made perfect with fleshly, i:e., sensuous and earthly ordinances? (cf. Romans 2:28; Philippians 3:3; Hebrews 9:10.) Having begun with the Holy Spirit ruling your spiritual life as its 'essence and active principle' (Ellicott), in contrast to "the flesh," the element in which the law works (Alford). The Galatians thought that they were going more deeply into the spirit; for the flesh may be easily mistaken for the spirit, unless believers maintain a pure faith.