Pope Shenouda III
We find the same testimony in the  New Testament:
 (a) (Rom.3:30):  "...since there is one God'
 (b) (l Cor. 8:4):   "...there is no other God but one"
 (c) (Jas. 2:19): "You   believe that there is one God. You do well. Even the demons believe - and tremble!"  This means that  even the demons, unfruitful as they are, know very well that there is  one God and tremble from His Judgment.