(no subject)
for kant, reason's unity is ultimately regulative indeed--practical reason is ultimately where reason is unified, yet theoretical reason provides certain things to practical reason (like concept of god as omnibenevolent, omniscient, and so on). moreover in the third critique kant's moral proof is supposed to reveal the (regulative) idea of God who creates nature for the purposes of human freedom -- this allows us to posit the end of freedom as happiness (since we have to act regardless morally, the regulative idea simply aids in positing an end to this action)...and reveals a kind of unity of reason insofar as nature is both mechanical and teleological in the supersensible principle. yet, again, this is from a regulative ideal - not from the real activity of the subject itself. it only aids to bring a sense of unity to reason (though, unlike in theoretical reason, with subjective conviction)