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The Ideal of pure reason (n.) or ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠omnitudo realitatis is not the totality of all actual things but just the reverse: the whole of all possible thing-contents.

The Ideal of pure reason (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠born when the idea of the sum total of all possibility refines itself into the concept of a single individual object, thoroughly determined by the idea alone.

The Ideal of pure reason (n.) does ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠not climb up from experience like the other ideas but breaks off from it entirely and descends from the bare concept of a supremely perfect being to the reality of all other things.

The Ideal of pure reason (n.) rests ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠on an inference from things I do not know by their transcendental concept to a being of all beings that I know even less, whose unconditioned necessity I cannot conceive at all.

The Ideal of pure reason (n.) cannot ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠be called inscrutable, because it is not even given as a thinkable object; as a mere idea it has its seat in the nature of reason and can be investigated.