Of God and His Creatures

That is to say, it is the same thing for God to be at all and to be exactly what He is. 'Godhead' and 'this God' are identical. No one possibly could be God save Him alone who actually is God. In God the ideal order and the actual order coincide, the order of thought (essence) and the order of being (existence).

Of God and His Creatures: 1.22