[82] [cap.18] And similar to what has been previously said, is that passage which occurs in another place, "God spake once, and twice I have also heard the same." [35] The expression "once" resembles the unmixed power, for the unmixed power is the unit, and the unit is the unmixed power; but the "twice" resembles the mixed power, for neither one nor the other is a simple thing, inasmuch as it admits of combination or of division.