When he received a Wahnsinnszettel from Nietzsche, Strindberg replied immediately (in Latin) with a quotation from Horace:

Much of Nietzsche's life had been spent, in metaphorical terms, doing precisely this: he had looked into the horizon of the infinite (GS §124), lived dangerously, built his cities on the shores of Vesuvius, and sent his ships into uncharted seas (GS §283), urging philosophers to “embark!” (GS §289) and gazing into the monstrous eye of infinity (“Toward New Seas” [“Nach neuen Meeren”]; KSA 5, 649), just as Zarathustra gazed out upon open seas from the midst of superfluity, no longer saying “God,” but saying “Superman” (Z II 2; KSA 4, 109). And in respect of the Revaluation of All Values (Umwerthung aller Werthe) Nietzsche described his future work as “the distant sound of thunder in the mountains” (mit einem fernen Donner im Gebirge; KSB 8, 453).

Following his collapse in Turin in January 1889, Nietzsche sent a note to Cosima Wagner, which said, simply: “Ariadne, I love you. — Dionysos” (Ariadne, ich liebe Dich. Dionysos; W 3, 1350). When he was in the psychiatric clinic in Jena, he is recorded as saying: “My wife, Cosima Wagner, has brought me here” (Meine Frau Cosima Wagner hat mich hierher gebracht).