Sympathy, Noumenon, Phenomenon

Schopenhauer adopts Kant's Phenomenon-Noumenon distinction, and agrees that the latter is the superior realm.  In other words, he shares with Kant a Noumenal Morality.  However, he diverges from his predecessor by positing that the Noumenon is the Will to Live, while Reason functions no more than to totalize Phenomena.  Now, the experience of that Noumenon, which is one and the same in all cases, constitutes Sympathy, according to Schopenhauer.  But this Morality of Universal Sympathy is profoundly different from Hume's.  For, the latter is merely Phenomenal, based on one's perception of similarity with others, as opposed to one's realization, despite appearances, of being at bottom one and the same as them.  So, Schopenhauer's Morality of Universal Sympathy also implies a criticism of the Atomism of the doctrine of Sympathy of Hume, and of many others.