Nicene and Post-Nicene Fathers, Ser. II, Vol. VII:
Select Letters of Saint Gregory Nazianzen.: Letter CLXXI

p. 469 Ep. CLXXI.  To Amphilochius, Bishop of Iconium.

Scarcely yet delivered from the pains of my illness, I hasten to you, the guardian of my cure.  For the tongue of a priest meditating of the Lord raises the sick.  Do then the greater thing in your priestly ministration, and loose the great mass of my sins when you lay hold of the Sacrifice of Resurrection.  For your affairs are a care to me waking or sleeping, and you are to me a good plectrum, and have made a welltuned lyre to dwell within my soul, because by your numerous letters you have trained my soul to science.  But, most reverend friend, cease not both to pray and to plead for me when you draw down the Word by your word, when with a bloodless cutting you sever the Body and Blood of the Lord, using your voice for the glaive. 4749

Footnotes

A very clear assertion of the Real Presence.