Benjamin’s thinking assumes, with respect to the topic of Nature, a peculiar "now of cognizability": an attempt at analysis in this sense is thus both possible and necessary. The author begins looking at the Arcades Project: here Baudelaire and Fourier embody respectively the degradation and the potentiality of Nature. This polarity, present in general within Benjamin’s works, is discussed through Heisenberg’s principle of uncertainty. Nature proves to be a sphinx, a "strange tissue of potentiality and degradation". The Author develops both the theoretical - the tension between epistemology and ontology, the "quantum" aspects of Benjamin’s "Copernican revolution", the defeat of natural teleology - and the practical implications of this situation; he closes the paper by highlighting the threshold-like character of Nature.
Keywords: Baudelaire, Benjamin, Fourier, Nature, Principle of uncertainty, Threshold