Philosophy, insofar as it represents the event of a culture of logos that has lasted more then two and a half millennia, associated itself from the outset with light (with the platonic sun, the Christian lumen, the Aufklärung, the enlightenment, the Lumières, the Husserlian evidence and the Heideggerian Lichtung). It was ignited at its origin as a metaphysics of light, from Heraclitus’ all-steering lightning, Plato and the Neo-Platonism of Plotinus, Proklos and Porphyry, via Augustine up to Robert Grosseteste, Roger Bacon, Bonaventura and Albertus Magnus in order, from the declining Middle Ages, to dominate the entire modern age, the metaphysics of cognitive self-transparency, the search for incontrovertible certainty, of the self-grounding or self-founding in the evidence of self-consciousness. As if the Western subject from its very dawning had stood under the dictates of a light that condemned it to articulate itself and its world in the concepts of what is obvious, of clarity, of visibility and openness, that is, of a certain logical evidence.