“The anatomy of self-propelling objects is subject to universal laws. Those of cars and animals are similar in many ways. First of all, there's the stomach. Stomachs are like petrol tanks. It takes energy to move around, and that energy must accompany its user. All self-propelling objects carry provisions with them in a sealed-off space, a stomach or a tank. Self-propelling beach animals like Animaris Percipiere have a stomach too. This consists of recycled plastic bottles containing air that can be pumped up to a high pressure by the wind.”

Source: The Cat Who Walks Through Walls

C'est une plaisante chose que la pensée dépende absolument de l'estomac, et malgré cela les meilleurs estomacs ne soient pas les meilleurs penseurs.
Letter to Jean le Rond d'Alembert (20 August 1770)
Citas

Compare Poor Richard's Almanack (1735) : The poor man must walk to get meat for his stomach, the rich man to get a stomach to his meat.
Introductio ad prudentiam: Part II (1727), Gnomologia (1732)

The Threepenny Opera (1928)

Attributed to Reynolds in: Orange Coast Magazine, Oct. 1984. p. 143

Source: The End of History and the Last Man

From the writings of William Cowper Brann (1855 – 1898), known as Brann the Iconoclast. http://www.google.co.uk/books?id=zc6W3a68NsoC&pg=PA60&dq=%22patriot+on+an+empty%22+inauthor:Brann&as_brr=0&sig=an5LOns0MG1gg4C2x7VNE1HdeuI
Misattributed

Djakarta Dispatches https://books.google.com/books?id=R8oAbRp1gVsC&pg=RA35-PP15&lpg=RA35-PP15&dq=#v=onepage&q&f=false (1960)