The doctrine of eternal recurrence in Nietzsche is an essentially ecstatic doctrine. It is also strangely incommunicable. Here the ecstasy that reveals singularizes. The essential revelation closes the one to whom it is given in his own singularity; only a singularity opens to the abysses and the Dionysian truth. Heidegger could then see in it an ontological doctrine. And an authentifying-singularizing-doctrine. Not, though, the same as his own. For Heidegger could suggest that the time horizon in which this doctrine conceives Being in its Becoming-the "deep eternity"-is in fact not a deep structure of time, but the linear time of an eternity of instants. Eternity is not deep. In addition the subject of the Nietzschean ecstasy-which longs for eternity- cannot appropriate itself, cannot become a whole, cannot really achieve singular existence. Are these Heideggerian thoughts criticisms of the Nietzschean experience? Is the deep ontological truth to be then sought elsewhere? Is the wholeness of one's own life- the essence of this existence- to be then sought in another experience of the time-horizon of Being? Or else do these Heideggerian observations not rather point to another structure of the thought involved-something like a surface thought? And to another structure of the one smitten by this thought-a singularity that exists only in a circle of continuous metamorphoses? Some deconstructive work by Derrida encourages us to look in this direction.