'Umbra'

1. (Per speculum et in enigmate). Everything is already seeming so imaginary to me, that it can lose nothing by being pretended, just as it can gain nothing by being real.

Rafael Sánchez Ferlosio in More bad years will come and they will make us even blinder

2. A shadow is a region of darkness where light is obstructed. It occupies the entire space behind an opaque object with a light source in front of it. The cross section of a shadow is a two-dimensional silhouette.

WIKIPEDIA

3. There is no link that can move from the visible to the declaration, or from the declaration to the visible. But there is a continuous re-linking that cuts across the irrational fault or fracture.

Gilles Deleuze. Foucault

4. Ma ditemi: che son li signe bui
of this body...

Dante, Paradise, II, 49-50

5. The nature of things tends to hide itself.

Heraclitus - 6. In the most remote limit beauty radiates;
from the most remote distance it radiates upon man,
far from knowledge, far from the question,
effortlessly
now only perceptible to the eye

Hermann Broch, The Death of Virgil

7. What a foolish leap is that which leads from the surface of the body to the interior of the soul!

Georg Christoph Lichtenberg

8. A cloud (it was not clear from what mountain it came from as seen from afar; only later was it learned that it had been Vesuvius) was rising. It did not resemble any other tree but a pine.
For it spread from bottom to top in the form of a trunk, so to speak, in a very elongated form, and it dispersed on some branches, I believe, because revived by a recent breath, when this diminished it then dissipated throughout the whole, abandoning or rather overcome by its weight; sometimes it had a bright white colour, other times it was dirty and stained, as if it had carried earth or ashes up to the sky...

Pliny the Younger, Epistulae 6, 16

9. Blind humans, like the light leaf, helpless creatures, made of crumbling clay, miserable mortals who, deprived of wings, spend your fleeting life like shadows or lying dreams.

Aristophanes, The Birds

10. And he also knew that the same was true of art, that it also only exists -oh,
Does it still exist, can it continue to exist? - insofar as it contains testament and knowledge, insofar as it renews itself in the unsurpassed, insofar as it realizes it, inviting the soul to a continual self-mastery and thus making it discover layer after layer of its reality, making it penetrate layer after layer deeper, penetrating layer after layer of its innermost undergrowth of being, pushing layer after layer down into the ever-unreachable and yet ever-foreseen, ever-known darkness from which the self is born and to which it returns, dark regions in which the self is born and dies, entrance and exit of the soul, but at the same time entrance and exit of all that is true for it, shown to the soul by the branch that shows the way and shines golden in the darkness of the shadows, by the golden branch of truth, which cannot be found or taken by violent effort, because the grace of finding and the grace of descending are one and the same, the grace of a self-knowledge, which belongs both to the soul and to art as their own. common truth, as their common knowledge of reality...

Hermann Broch, The Death of Virgil

11. Je vais voir l'ombre que tu devins.

Stéphane Mallarmé

12. Tempus fugit, sicut clouds, quasi naves, velut umbra.

Book of Job -