For the same reason there is nowhere to begin to trace the sheaf or the graphics of differance. For what is put into question is precisely the quest for a rightful beginning, an absolute point of departure, a principal responsibility. The problematic of writing is opened by putting into question the value of the arkhe. What I will propose here will not be elaborated simply as a philosophical discourse, operating according to principles, postulates, axioms, or definitions, and proceeding along the discursive lines of a linear order of reasons. In the delineation of differance everything is strategic and adventurous. Strategic because no transcendent truth present outside the field of writing can govern theologically the totality of the field. Adventurous because this strategy is a not simple strategy in the sense that strategy orients tactics according to a final goal, a telos or theme of domination, a mastery and ultimate reappropriation of the development of the field. Finally, a strategy without finality, what might be called blind tactics, or empirical wandering if the value of empiricism did not itself acquire its entire meaning in opposition to philosophical responsibility. If there is a certain wandering in the tracing of differance, it no more follows the lines of philosophical-logical discourse than that of its symmetrical and integral inverse, empirical-logical discourse. The concept of play keeps itself beyond this opposition, announcing, on the eve of philosophy and beyond it, the unity of chance and necessity in calculations without end.