The object of this paper is to inquiry into the relationship between the conceptual pair śūnyatā/pūrṇatā [emptiness/fullness]—, which encapsulates different aspects of the Hindu and Buddhist soteriology—and the theoretical and practical ambitions of Phenomenology of Life. For this purpose the focus is laid on Rolf Kühn’s critique of Buddhism in his book Lebensreligion. Unmittelbarkeit des Religiösen als Realitätsbezug (2013) and the consequences of this critical position for a future dialogue of religions beyond dogmatic limits and impositions. Rolf Kühn’s radical gesture in his confrontation with philosophical and religious systems aims at laying the foundations of a religion of Life free from all confessional superposition and preceding every hermeneutical layer of assigned meaning. However, this radical critique goes hand in hand with a very strong affirmation of (absolute) Life in terms of a fundamentum inconcussum. The semantic field of emptiness and fullness (with an methodological privilege of “emptiness” over “fullness”) may serve as an alternative to think the dynamics of life processes without having to force the manifoldness into an ontological mode of unification— even when this unification is said to be immanent to the process of Life itself.