RABANUS . But because many with what zeal they take up the pursuit of virtue, do not with the same complete it; but either grow cool, or fall away rapidly; it follows, But many that are first shall be last, and the last first.
ORIGEN . By this He exhorts those that come late to the heavenly word, to haste to ascend to perfection before many whom they see to have grown old in the faith. This sense may also overthrow those that boast to have been educated in Christianity by Christian parents, especially if those parents have filled the Episcopal see, or the office of Priests or Deacons in the Church; and hinder them from desponding who have entertained the Christian doctrines more newly. It has also another meaning, the first, are the Israelites, who become last because of their unbelief; and the Gentiles who were last become first. He is careful to say, Many; for not all who are first shall be last, nor all last first. For before this have many of mankind, who by nature are the last, been made by an angelic life above the Angels; and some Angels who were first have been made last through their sin.
REMIGIUS . It may also be referred in particular to the rich man, who seemed to be first, by his fulfilment of the precepts of the Law, but was made last by his preferring his worldly substance to God. The holy Apostles seemed to be last, but by leaving all they were made first by the grace of humility. There are many who having entered upon good works, fall therefrom, and from having been first, become last.