All who are called by the name of priest, are also named as angels, as the prophet testifies; saying: For the lips of the priest shall keep knowledge, and they shall seek the law at his mouth: because he is the angel of the Lord of hosts (Malachia 2:7).
You likewise can reach to the sublimity of this name, if you so wish. For each one among you, in as far as he is able, in as far as he responds to the grace of the heavenly invitation, should he recall his neighbor from evil-doing; should he seek to encourage him in doing what is good; when he reminds him of the eternal kingdom, or of the punishment of wrong-doers; whenever he employs words of holy import, he is indeed an angel.
And let no one say: I am not capable of giving warning; I am not a fit person to exhort others. Do what you can, lest your single talent, unprofitably employed, be required of you with punishment.