Robert Reininger, Philosophie des Erlebens, p. 227:
Gegen Buddhismus: Trishna nicht ertoeten (ausloeschen), sondern durch
Ueberhoehung in den Dienst des Vernunftwillens stellen — sonst fehlt
diesem die lebendige Kraft, die nur der Daseinsbejahung eignet (A 751,
1932).
Against Buddhism: Trishna is not to be killed or extinguished, but
elevated and placed in the service of the rational will. Without this
sublimation, the rational will lacks the vital force appropriate to the
affirmation of existence. (tr. BV)
Trishna is Sanskrit for desire, thirst. Central to Buddhism is the notion that the suffering and general unsatisfactoriness of life is rooted in desire, and that salvation is to be had by the extirpation of desire. Reininger's point is one with which I wholly agree. The goal ought not be the extinction of desire, but its sublimation. Desire as such is not the problem; the problem is misdirected desire. Properly channeled and sublimated, desire provides the motive force for the rational will.
See my "No Self? A Look at a Buddhist Argument," International Philosophical Quarterly, vol. 42, no. 4 (December 2002), pp. 453-466.)