He is a Being infinitely perfect: Of this we cannot doubt.

But in the same manner as we ought not to imagine, even supposing him corporeal, that he is clothed with a human body, as the ANTHROPOMORPHITES asserted, under colour that that figure was the most perfect of any; so, neither ought we to imagine that the spirit of God has human ideas, or bears any resemblance to our spirit, under colour that we know nothing more perfect than a human mind.
We ought rather to believe, that as he comprehends the perfections of matter without being material....

he comprehends also the perfections of created spirits without being spirit, in the manner we conceive spirit: That his true name is, He that is; or, in other words, Being without restriction, All Being, the Being infinite and universal." After so great an authority, DEMEA, replied PHILO, as that which you have produced, and a thousand more which you might produce, it would appear ridiculous in me to add my sentiment, or express my approbation of your doctrine.

But surely, where reasonable men treat these subjects, the question can never be concerning the Being, but only the Nature, of the Deity.

The former truth, as you well observe, is unquestionable and self-evident.