Prologue

Sense is never only one of the two terms of the duality сontrasts things and propositions, substantives and verbs, denotations and expressions; it is also the frontier, the cutting edge, or the articulation of the difference between the two terms, since it has at its disposal an impenetrability which is its own and within which it is  reflected. for these reasons sense must be developed for its own sake in a series of paradoxes, which are now intenal.

Deleuze