I have often laughed on hearing philosophers declare that the intelligence of a nation is not so much the result of the climate as of education. Such sages should be sent to Naples and then to St. Petersburg, and be told to reflect, or simply to look before them. If the great Boerhaave had lived at Naples he would have learnt more about the nature of sulphur by observing its effects on vegetables, and still more on animals. In Naples, and Naples alone, water, and nothing but water, will cure diseases which are fatal elsewhere, despite the doctors’ efforts.
The duke, who had left me to the wits for a short time, returned and took me to the box of his mistress, who was accompanied by an old lady of respectable appearance. As he went in he said, “‘Leonilda mia, ti presento il cavalier Don Giacomo Casanova, Veneziano, amico mio’.”
She received me kindly and modestly, and stopped listening to the music to talk to me.
When a woman is pretty, one recognizes her charms instantaneously; if one has to examine her closely, her beauty is doubtful. Leonilda was strikingly beautiful. I smiled and looked at the duke, who had told me that he loved her like a daughter, and that he only kept her for form’s sake. He understood the glance, and said,—
“You may believe me.”
“It’s credible,” I replied.
Leonilda no doubt understood what we meant, and said, with a shy smile,—
“Whatever is possible is credible.”
“Quite so,” said I, “but one may believe, or not believe, according to the various degrees of possibility.”
“I think it’s easier to believe than to disbelieve. You came to Naples yesterday; that’s true and yet incredible.”