Anselm of Canterbury,
Proslogion
“ How shall my heart understand what Thou art? Surely Thou art life and wisdom and truth and goodness and blessedness and eternity and everything that is truly good. These indeed are many; but my narrow understanding cannot see so many good things in one apprehension at one and the same time, so as to be delighted by the presence of all at once. How then, O Lord, art Thou all these? Are they parts of Thee, or is rather everyone of these wholly what Thou art? For whatsoever is composed of parts is not in all respects one, but in a certain respect many and diverse from itself ”

