110. So everything which we esteem holy proclaims that Sole Holiness. Cherubim and Seraphim with unwearied voices praise Him and say: “Holy, Holy, Holy, is the Lord God of Sabaoth.” Isa. vi. 3. They say it, not once, lest you should believe that there is but one; not twice, lest you should exclude the Spirit; they say not holies [in the plural], lest you should imagine that there is plurality, but they repeat thrice and say the same word, that even in a hymn you may understand the distinction of Persons in the Trinity, and the oneness of the Godhead and while they say this they proclaim God.