“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.”
The Notebooks of Leonardo da Vinci (1883), I Prolegomena and General Introduction to the Book on Painting
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Leonardo Da Vinci363
Italian Renaissance polymath 1452–1519Related quotes
Leonardo Da Vinci (1452–1519) Italian Renaissance polymath
The Notebooks of Leonardo da Vinci (1883), XIX Philosophical Maxims. Morals. Polemics and Speculations.
Variant: Just as iron rusts from disuse... even so does inaction spoil the intellect.
“As iron is eaten away by rust, so the envious are consumed by their own passion.”
Antisthenes (-444–-365 BC) Greek philosopher
§ 5
From Lives and Opinions of the Eminent Philosophers by Diogenes Laërtius
Muhammad (570–632) Arabian religious leader and the founder of Islam
Irshadul Qulub; Page 78
Shi'ite Hadith
“Lies are rust on iron. A blemish on power.”
Pierce Brown book Golden Son
Source: Golden Son (2015), Ch. 15: Truth; Aja
George Gissing book The Private Papers of Henry Ryecroft
Winter § I, p. 213
The Private Papers of Henry Ryecroft (1903)
“Vice does not lose its character by becoming fashionable.”
John Wesley (1703–1791) Christian theologian
“If gold rusts, what then can iron do?”
Geoffrey Chaucer book The Canterbury Tales
Source: The Canterbury Tales