Let the entire man be seized with fear; let the whole world tremble; let heaven exult when Christ, the Son of the Living God, is on the altar in the hands of the priest. O admirable height and stupendous condescension! O humble sublimity! O sublime humility! that the Lord of the universe, God and the Son of God, so humbles Himself that for our salvation He hides Himself under a morsel of bread.

– Francis of Assisi, Letter to all the Friars, ca. 1221

https://www.sacred-texts.com/chr/wosf/wosf13.htm