The first pope who had been a monk up until that time. [Lives of the Saints at 273]

“[H]e preferred to call himself by the proudly humble title of Servus servorum Dei–Servant of the servants of God.”

Butler’s Lives of the Saints, concise and revised edition, HarperCollins (1991).

https://johnrubens.wordpress.com/2016/09/03/butlers-livesofthesaints-edited-by-michael-walsh-september3-stgregorythegreat