For, by Leibniz's lights, the active and passive forces he postulates not only render physics itself more accurate and consonant with reason but at the same time set the stage for its intelligible grounding in his own deeper metaphysics.
Although the details of this intelligible grounding story remain less than perspicuous, there can be no doubt that Leibniz saw his relationalism about space and time as dovetailing with the foundations of his monadic metaphysics.
Like the latter they are often unseen and seldom intelligible at ground level.
It is widely accepted that Leibniz's primitive forces are supposed to serve as the intelligible metaphysical grounds for the forces that are of concern in physics, and more specifically that active derivative forces are to be grounded in active primitive forces while passive derivative forces are to be grounded in passive primitive forces.
For in order for the language of the virtues to be intelligible, it must be grounded in a thick account of the good.
Socrates argues that the soul is like intelligible being on the grounds that it is not visible and, in general, not perceptible (anyhow to humans, as Cebes adds at 79b), and that it shares its natural function with the divine, namely to rule and lead (the body in the one case, mortals in the other).
The intelligible names could form the ground of a theology independent of any specific religious tradition or sacred text.
As that which makes the world intelligible, God relates to the ground in such a way that the 'real', which takes the form of material nature, is 'in God' but "is not God seen absolutely, i.e. insofar as He exists; for it is only the ground of His existence, it is nature in God; an essence which is inseparable from God, but different from Him" (SW I/7, p. 358).
On Regan's view, if the agent's choice is to be intelligible to her, her wants must be grounded in reasons.
Plato's theory of participation, which explains the relation between the intelligible world and the sensible reality it grounds, raised many problems, several of which Plato himself brings up in the first part of his Parmenides.
