I read Foucault's essay ''What is Enlightenment?'' as his apology. Res
ponding perhaps, to those who claim his work undermines Enlightenment
thinking, Foucault sketches a way to continue that liberatory traditio
n, offering his own genealogical critique as an heir to Kant in the pr
omotion of human freedom. This recovery is questionable. In commenting
on Kant's version of the Enlightenment, Foucault fails to examine the
archaeology of the key notion of public reason. I attempt a Foucauldi
an reading of Kant's essay as an assertion of power rather than of the
freedom of thought from power, Foucault's silence here makes conspicu
ous the relations of critique. This silence is not fatal, but his apol
ogy must be depended for a recovery of critique. The emerging aporia,
that in order to criticize power we must first be invested by and impl
icated in it, is a profound, but not unanswerable, challenge to any co
ntemporary attempt to retain the liberatory promise of Enlightenment t
hinking.