Deleuze's “transcendental empiricism” and the “empirical side” of Whitehead's metaphysics are paradoxical unless placed in the context of their unorthodox readings of empiricism. I explore this context focusing on their engagements with Hume. Both subvert presumptions of a categorical gap between external nature and internal human experience and open possibilities for a speculative empiricism that is nonreductive while still affirming experience as source for philosophical thinking. Deleuze and Whitehead follow Hume in beginning with events of sensation as primary but do not presume the logic of (human) subjects and objects (of nature) as necessary structuring polarities for their interpretation. This challenges a basic distinction (between inner and outer or between self and world) that seems inherent in the ordinary concept of experience, thus earning the moniker speculative. The speculative empiricist studies how these abstractions arise from events of experience prior to their consolidation in representation. This includes a critical component: to what extent do unexamined assumptions about conceptual abstraction hinder, block, or prefigure experiential attention? This critical component has existential implications for how we attend to the affective, intuitive, and preconceptual.

This commentary considers Wahl’s 1942 “Poetry as Spiritual Exercise” in the context of his interests in radical empiricism and process metaphysics. In doing so, it raises appreciation for the complexity of his thought, identifies specific notes of influence on Gilles Deleuze, and responds to worries that Wahl’s notion of spiritual exercise is predominantly a form of withdrawal, quietism, or retreat from the horrors of World War Two. For Wahl, rather than passive contemplation of a determinate artifact, poetry is a mode of experience that, to speak with Whitehead and James, is a making. This experience of poetry develops affordances of thought that strengthen existential capacity for remaining open to uncertainty, fragility, and vulnerability.

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The article explores the connection between James's “radical empiricism” and Deleuze's “transcendental empiricism” with a particular focus on the concept of “pure experience.” It argues for the substantial nature of this connection in terms of both philosophical motivations and formal innovations. Both thinkers are motivated to construct “better” empiricisms that do not complacently accept conventional conceptual representations as exhaustive of the real. Moreover, radical empiricism develops a latent critique of representational models of consciousness that is accomplished through a turn to events or processes as ontologically primary. These innovations are further developed by Deleuze in his treatment of the problem of individuation. Taken together, they help to specify the metaphysical reasons for the experimental pluralism that both James and Deleuze affirm, showing how these reasons are inextricable from the radical empiricist impulse to be maximally inclusive of modalities of real experience, including the felt, the vague, and the affective. Emphasizing the metaphysical dimensions of these alternative empiricisms brings into clearer focus the stakes of philosophical thought as part of the open-ended and ongoing relational processes by which the universe continues to unfold.

“La Poésie Comme Exercice Spirituel” first appeared in a 1942 issue of Revue Fontaine edited by Jacques and Raissa Maritain and was subsequently republished in Wah’s 1948 text Poésie, Pensée, Perception, published by Calmann-Lévy. The following is a translation of the Fontaine version. I have noted all of the variations from the latter version in the notes. As I emphasize in my commentary, the piece is a notable display of Wahl’s eclectic range of influences. Most importantly, it shows the extent to which his interest in radical empiricism and process metaphysics informs his creative approach to the intersection of poetics and metaphysics. These interests are not explicitly named in the essay, and yet their influence is pervasive. The essay also includes several moments of substantial resonance with the work of Gilles Deleuze, as noted in the commentary.