Glossa Ordinaria

I bowed my knees, etc. He prepared himself by compunction of heart and by the disposition of the body, that he might be made worthy of the hearing of the mercy above; and he bursts forth into these words of prayer. And he bows his knees, spreads out his hands, and pours forth prayers at the time of the evening sacrifice, knowing that what is done in a spirit of humility and in a contrite mind is more acceptable than what is offered with the flesh and blood of beasts.