Galatians 5:8

8. This persuasion The Greek for persuasion is another form of the word faith, and is here used as an antithesis to the true faith named above. It may, like the English persuasion, be taken in an active or passive meaning; that is, it may mean this proselyting you by Judaists, or this credulity in believing Judaism. Very clearly it here means the former of the two, as referring to the who, and the did hinder of the last verse. The who is the same as the he that troubleth in Galatians 5:10. The did hinder is the present persuasion to become circumcised, coming from the who. And this who is the little leaven of the next verse.

Him… calleth you God, or Christ. Note, Galatians 1:6. The present term implies that God is in permanent act of calling the Christian. The whole passage implies, that such calling neither secures the necessary first obedience of the called nor his perseverance. In that sense, no calling of God is an “effectual calling.”