Albert Barnes' Notes on the Whole Bible - James 2:20
But wilt thou know - Will you have a full demonstration of it; will you have the clearest proof in the case. The apostle evidently felt that the instances to which he was about to refer, those of Abraham and Rahab, were decisive.O vain man - The reference by this language is to a man who held an opinion that could not be defended. The word “vain” here used (κενε kene) means properly “empty,” as opposed to “full” - as empty hands, having nothing in them; then fruitless, or without utility or... read more
The Pulpit Commentary - James 2:20-26
Justification by faith and works. The meaning of this notable passage has been much contested, because its teaching seems to many minds to contradict the doctrine of justification by faith. It was this apparent antagonism which led Martin Luther for a time to denounce the whole Epistle of James as a mere handful of "straw." Since his day, however, good men have been coming more and. more to see that Paul and James, so far from opposing one another, are in reality presenting different sides... read more