: Soulez's work focuses on the ethical dimension of philosophy manifested in the way in which thought engages and transforms an acting subject on a formal level, beyond what is "said" as such, including any explicitly ethical statements. Wittgenstein's injunction to "silence" on certain ethical matters does not, for Soulez, prevent his being a thinker of the ethical stakes of philosophy, contrary to more orthodox readings of the analytical tradition.

: Wittgenstein raises the notion of "conversion" in philosophy through his claims that philosophical understanding is a matter of the will rather than the intellect. Soulez examines this notion in Wittgenstein's philosophy through a series of reflections on the aims and methodology of his philosophical "grammar," in relation to comparable models among Wittgenstein's contemporaries (Freud, James) and from the history of philosophy (Saint Augustine, Descartes).

Wittgenstein raises the notion of "conversion" in philosophy through his claims that philosophical understanding is a matter of the will rather than the intellect. Soulez examines this notion in Wittgenstein's philosophy through a series of reflections on the aims and methodology of his philosophical "grammar," in relation to comparable models among Wittgenstein's contemporaries and from the history of philosophy.