A. YF 6S 
“My success as a man of science, whatever this 
may have amounted to, has been determined, as far 
as I can judge, by complex and diversified mental 
qualities and conditions. Of these, the most impor- 
tant have been—the love of science—unbounded 
patience in long reflecting over any subject—industry 
in observing and collecting facts—and a fair share 
of invention as well as of common sense. With such 
moderate abilities as I possess, it is truly surprising 
that I should have influenced to a considerable 
extent the belief of scientific men on some important 
points.” 
Autobiography (1881); The Life and Letters of Charles 
Darwin, Vol. 1. p. 107. 
