 Foucault focuses upon the moment of transition, as modern reason begins to take shape in a confluence of concepts, institutions, and practices, or, as he would say, of knowledge and power. In its nascency, reason is a power that defines itself against an other, an other whose truth and identity is also assigned by reason, thus giving reason the sense of originating from itself. For Foucault, the issue is that madness is not allowed to speak for itself and is at the disposal of a power that dictates the terms of their relationship. As he remarks: “What is originative is the caesura that establishes the distance between reason and non-reason; reason's subjugation of non-reason, wresting from it its truth as madness, crime, or disease, derives explicitly from this point” (Foucault 1965, x). The truth of reason is found when madness comes to stand in the place of non-reason, when the difference between them is inscribed in their opposition, but is not identical to its dominant side. In other words, the reason that stands in opposition to madness is not identical to the reason that inscribes their difference. The latter would be reason without an opposite, a free-floating power without definite shape. As Foucault suggests, this free-floating mystery might be represented in the ship of fools motif, which, in medieval times, represented madness. Such is the paradoxical structure of historical transformation.