When I say that this phase is necessary, the word phase is perhaps not the most rigorous one. It is not a question of a chronological phase, a given … - Jacques Derrida

No differeance without alterity, no alterity without singularity, no singularity without here-now.

A text is not a text unless it hides from the first comer, from the first glance, the law of its composition and the rules of its game. A text remains, moreover, forever imperceptible. Its law and its rules are not, however, harbored in the inaccessibility of a secret; it is simply that they can never be booked, in the present, into anything that could rigorously be called a perception.

It is also the becoming-space of the spoken chain - which has been called temporal or linear; a becoming-space which makes possible both writing and every correspondence between speech and writing, every passage from one to the other.
The activity or productivity connoted by the a of différance refers to the generative movement in the play of differences. The latter are neither fallen from the sky nor inscribed once and for all in a closed system, a static structure that a synchronic and taxonomic operation could exhaust. Differences are the effects of transformations, and from this vantage the theme of différance is incompatible with the static, synchronic, taxonomic, ahistoric motifs in the concept of structure.