21. There is this difference, then, between the anointing of a bishop and a prince, that the head of the bishop is consecrated with chrism, while the arm of the prince is anointed with oil: to show, namely, how great a difference there is between the authority of a bishop and the power of a prince. And observe that, as we read in the gospel, [Footnote 530] a certain man called his servants and gave unto them ten talents. Herein the calling of a servant is the canonical election of a bishop, which taketh place according to the calling of the Lord Who called Aaron. A talent is given to him, when he who hath laid his hands upon him giveth him the text of the gospel, saying, 'Go and preach.' And the bishop himself, according to the use of some churches, when first he entereth his see, carrieth the gospels in his bosom, showing his talent as if to trade with it. In some churches also when the archbishop giveth the bishop his pastoral staff, he saith, 'Go and preach,' and he immediately blesseth the people: by which is represented that Moses was sent into Egypt with a rod. [Footnote 530: S. Matthew xxv.] {146} 22. Furthermore, bishops on the day of their consecration have been wont to ride on horses covered with white robes; to represent that which we read in the Apocalypse, 'The armies which are in heaven follow him riding on white horses.' [Footnote 531] The armies which are in heaven are good and just men and prelates, who as these heavenly riders do daily follow God in all good works: who for this reason are said to be in heaven, because they love and seek after heavenly things alone; whence the Apostle saith, 'Our conversation is in heaven.' [Footnote 532] These armies, that is good and just men and prelates, follow Jesus, whensoever they vanquish vices in themselves by discipline, in their neighbours by admonition. Whence S. James saith, 'He which converteth the sinner from the error of his way shall save a soul from death, and shall hide a multitude of sins.' [Footnote 533] These armies have white horses and chaste bodies. [Footnote 531: Apocalypse xix, 14.] [Footnote 532: Philippians iii, 20.] [Footnote 533: S. James v, 20.]