In What Is Philosophy? we find philosophy devised as that power of thinking and creating which, in a division of labour with science and art, creates the concept. This division of labour points to the free interplay of Reason, Understanding and Imagination in Kant's Critique of Judgement and enables us to affirm, without obliterating the differences in kind, the non-hierarchical relationship between the three forms of thought that is asserted by Deleuze and Guattari. However, as powers of thinking and creating, philosophy, science and art do not inscribe themselves in a transcendental subject. Rather, Deleuze and Guattari conceive of them, following Spinoza's ‘creating nature’, as powers that express themselves in an attribute in which every thinking subject participates.