Leonardo da Vinci -- The Notebooks of Leonardo da Vinci, Vol. 1, ch. 2 “Aphorisms” (1888) [ed/tr. McCurdy (1938 ed.)]

Dave — Sat, 20 Sep 2025 05:00:18 +0000

Iron rusts from disuse, stagnant water loses its purity and in cold weather becomes frozen, even so does inaction sap the vigor of the mind.

Leonardo da Vinci (1452-1519) Italian artist, engineer, scientist, polymath
The Notebooks of Leonardo da Vinci, Vol. 1, ch. 2 “Aphorisms” (1888) [ed/tr. McCurdy (1938 ed.)]
(Source)

Source noted as Codice Atlantico 289 v. c.

Verne, Jules -- Journey to the Center of the Earth (1864)

Dave — Fri, 16 Sep 2016 22:33:26 +0000

We are of opinion that instead of letting books grow moldy behind an iron grating, far from the vulgar gaze, it is better to let them wear out by being read.

Jules Verne (1828-1905) French novelist, poet, playwright
Journey to the Center of the Earth (1864)
(Source)

WIST Quotations

Leonardo da Vinci -- The Notebooks of Leonardo da Vinci, Vol. 1, ch. 2 “Aphorisms” (1888) [ed/tr. McCurdy (1938 ed.)]

Verne, Jules -- Journey to the Center of the Earth (1864)