“Great leaders are formed only by taking on great challenges.”
Source: 2010s, Winter is Coming (2015), p. 190
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Garry Kasparov 61
former chess world champion 1963Related quotes

Quoted in the Congressional Record, 11 December 1971 http://books.google.com/books?id=ltuwtwQcKHwC&q=%22There+are+no+great+men+there+are%22+%22only+great+challenges+which+ordinary+men+like+you+and+me+are++forced+by+circumstances+to+meet%22&pg=PA46480#v=onepage.

2010s, 2015, Presidential Bid Announcement (June 16, 2015)
On Winston Churchill http://www.amazon.com/review/R7UQOFFBBBUNN/

“Great necessities call forth great leaders.”
This seems to first appear in Why Leaders Can't Lead : The Unconscious Conspiracy Continues (1989) by Warren G. Bennis, p. 159, where it is cited as being from a letter to Thomas Jefferson, but it might be a misquote of "Great necessities call out great virtues" stated in a letter to her son John Quincy Adams (19 January 1780)
Disputed

“It is only great men who take up a great space by not being there.”
Lecture at the University of Notre Dame (13 October 1930), as quoted in notes taken by Professor Richard Baker, of the University of Dayton, and published in The Chesterton Review (Winter/Spring 1977)

“No person can be a great leader unless he takes genuine joy in the successes of those under him.”
Not by Auden; sources from the 1980s attribute it to the Rev. W. A. Nance (the name seems to have been confused with Auden's).
Misattributed

Video commentary featured on website of the Chicago Public Education Fund http://www.cpef.org/nm_video.htm#

Source: Start with Why: How Great Leaders Inspire Everyone to Take Action