“One needs only eyes to see the necessary influence of old age on reason.”
p, 125
Man a Machine (1747)
Help us to complete the source, original and additional information
Julien Offray de La Mettrie 42
French physician and philosopher 1709–1751Related quotes

“Nature abhors the old, and old age seems the only disease; all others run into this one.”
1840s, Essays: First Series (1841), Circles

“In modern industrial society only minimal effort is necessary to satisfy one's physical needs.”
"Surrogate Activities", item 40
Industrial Society and Its Future (1995)
Source: Angels, Demons, & Gods of the New Millennium (1997), Chapter 4

“There's no such thing as old age; there is only sorrow.”
"A First Word"
A Backward Glance http://gutenberg.net.au/ebooks02/0200271.txt (1934)

Letter to George Washington (24 April 1779)

“It is only with the heart that one can see rightly, what is essential is invisible to the eye.”
Source: A Long Search for Information (2004), p. 1; Opening sentence.