Subtlety Quotes
The subtlety of nature is greater many times over than the subtlety of the senses and understanding.
1620 Novum Organum, bk.1, aphorism10.
"The Book of Disquiet". Book by Fernando Pessoa (1982). Translated by Richard Zenith, p. 53, 2006.
'The Innocents Abroad' (1869) ch. 27
Cindy Gerard (2007). “To the Brink”, p.45, Macmillan
"The Collected Papers of Bertrand Russell".