Simon Duffy's Logic of Expression, Introduction, "Spinoza and the Problem of Expression," §3

by Corry Shores
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[The following summarizes Simon Duffy's extraordinary book, The Logic of Expression: Quality, Quantity and Intensity in Spinoza, Hegel and Deleuze, Introduction, §3.

Duffy's work is remarkable, so I highly recommend this book. If it costs too much, perhaps encourage your library to obtain a copy.]

Simon Duffy. The Logic of Expression: Quality, Quantity and Intensity in Spinoza, Hegel and Deleuze, Introduction, §3:

Duffy analyses Deleuze's Expressionism in Philosophy within Deleuze's wider project to establish a different/cial philosophy (7-8). Deleuze's alternate philosophical lineage moves from Scotus through Spinoza to Nietzsche (8b). Philosophy's aim is to create new concepts, and for this purpose Deleuze brings his new thinking on expression and intensity into relation with such past concepts as Scotus' univocity, Spinoza's Substantial immanent cause, and Nietzsche's eternal return (8c). In this way, Deleuze offers his logic of difference and logic of expression as an alternative to Hegelian dialectical logic. Thus Deleuze's unique interpretation of Spinoza "redeploys" Spinozistic concepts to counter Hegel's dialectic with a differential philosophy. (8-9)

Duffy will not detail the myriad implications of Deleuze's Spinozism found in his other works; rather, Duffy will discuss ways in which Deleuze's logic of expression may itself be employed to determine these implications. For example, he concludes by suggesting a way that the logic of expression may determine the relation between philosophy's plane of immanence and the ideas distributed over this plane (as treated in What is Philosophy?) (9c.d).

Duffy, Simon. The Logic of Expression: Quality, Quantity and Intensity in Spinoza, Hegel and Deleuze. Aldershot: Ashgate Publishing, 2006.