“Pushing one’s limits beyond the current level permits difficult tasks to become less complex.”
2006
Related quotes

Source: The Principles of Political Economy and Taxation (1821) (Third Edition), Chapter VII, On Foreign Trade, p. 91

Don Soderquist “ The Wal-Mart Way: The Inside Story of the Success of the World's Largest Company https://books.google.com/books?id=mIxwVLXdyjQC&lpg=PR9&dq=Don%20Soderquist&pg=PR9#v=onepage&q=Don%20Soderquist&f=false, Thomas Nelson, April 2005, p. 107.
On Leading Well

"Doll Factory, Gun Factory" (1973), essay reprinted in The Maker of Dune : Insights of a Master of Science Fiction (1987), edited by Tim O'Reilly
General sources

Majlisi, Bihārul Anwār, vol.78, p. 364
General

Source: The structuring of organizations (1979), p. 173

“One of the most difficult of the philosopher's tasks is to find out where the shoe pinches.”
Source: 1910s, Notebooks 1914-1916, p. 61