This Italian quotation suggests that in a crazy world the only sane person is the one who plays the fool. It reminds me of a saying by an English clown that the fool stands on his head and sees the world the right way up. These are late echoes of a European medieval genre of art on the theme of the World Upside Down.
Everything is folly in this world except to play the fool.
Tutto è follia in questo mondo fuorchè il folleggiare.
Source: Giacomo Leopardi, Zibaldone (1823), ed. F. Flora (Milan: 1938), II, 820, quoted in Kaiser, p. 10
Photo credit: Gina_Janosch at Pixabay