This He brings in because the Priests had asked not in order to learn, but to tempt Him. But of the common folk many had believed; and for that reason He brings forward the parable of the two sons, shewing them therein that the common sort, who from the first professed secular lives, were better than the Priests who from the first professed the service of God, inasmuch as the people at length turned repentant to God, but the Priests impenitent, never left off to sin against God. And the elder son represents the people; because the people is not for the sake of the Priests, but the Priests are for the sake of the people.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
