No longer not yet

Some things I have been intending to write about for so long that that when I finally sit down to write I no longer have any interest in writing them. So it is with the rhetorical figure of ‘not yet . . . no longer’ which I found in Agamben a few years ago and which then struck me as the most perfect decsription of the language of poetic criticism which is not yet unequivocal but no longer music. Which goes to show that even the seed that takes a long time to germinate can be uprooted with a single tug.

Any thoughts?