Galatians 3:3

Verse 3. Are ye so foolish? Can it be that you are so unwise? The idea is, that Paul hardly thought it credible that they could have pursued such a course. They had so cordially embraced the gospel when he preached to them, they had given such evidences that they were under its influence, that he regarded it as hardly possible that they should have so far abandoned it as to embrace such a system as they had done. Having begun in the Spirit. That is, when the gospel was first preached to them. They had commenced their professedly Christian life under the influence of the Holy Spirit, and with the pure and spiritual worship of God.