19 After this the Priest says, “Holy things to holy men.” Holy are the gifts presented, having received the visitation of the Holy Ghost; holy are you also, having been deemed worthy of the Holy Ghost; the holy things therefore correspond to the holy persons. Then ye say, “One is Holy, One is the Lord, Jesus Christ.” For One is truly holy, by nature holy; we too are holy, but not by nature, only by participation, and discipline, and prayer.
Source: Catechetical Lectures (New Advent)