This 1939 work by René Magritte exemplifies his mature Surrealist practice of disrupting perception through the juxtaposition of incompatible realities. The standing female nude undergoes a striking chromatic metamorphosis—her upper body dissolving into the deep cerulean tonality of a twilight seascape while her lower half retains warm flesh tones—as a torn paper-like boundary reveals a domestic interior wall, collapsing the distinction between image and environment. *Le miroir universel* (The Universal Mirror) encapsulates Magritte's philosophical interrogation of representation itself, suggesting that reality and its depiction are inseparable yet perpetually in tension. As a significant canvas from the interwar period, it holds considerable importance within Magritte's oeuvre and the broader canon of Belgian Surrealism.