After Becketts's struggles during WW11,fighting with the resistance and trying to not be caught by the Nazi's,a change came over his work.Some called it a sort of passivity.I think openess would be a better term,closer to Meister Eckhardt's Gelassenheit.This quote points to what happened within him.

At the close of this long, impassioned letter of March 9, 1949, Beckett declares himself “no longer capable of writing in any sustained way about Bram or about anything,” a disclaimer that is almost comical when one considers the dense pages of forensic disquisition that have gone before, as Gunn points out. Yet we must fix on the vital word here, for in the next breath Beckett declares: “I am no longer capable of writing about.” This is far more than—perhaps is not at all—a confession of critical impotence. Years earlier, at the end of the 1920s, in an essay on Finnegans Wake the young Beckett had insisted that Joyce’s final masterpiece is not about something, but is something, a thing-in-itself that is only comprehensible in its own terms. Now, in the controlled frenzy of the composition of L’Innommable, Beckett is aiming at a similar autonomy of the work, by seeking to instill in himself as artist that sense he perceived in Cézanne “of his incommensurability not only with life of such a different order as landscape but even with life of his own order, even with the life…operative in himself.”⁸