Specifically, as gender polarization in a relationship decreases, the experience of it improves. Without that rebalancing, even the most perfect content will unravel increasingly. Once the process is balanced, the magic of having ideal content is no longer necessary. The rebalancing process which creates a relationship free of polarizing gender defenses is clearly difficult and threatening initially in the same way that giving up an addiction seems to be. Once achieved however, a relationship free of distortion, false illusions, resentment, and hopelessness truly becomes possible.
What Men Still Don't Know About Transforming Their Relationships, pp. 194–198
What Men Still Don't Know About Women, Relationships, and Love (2007)
“The landing approach was, by far, the most difficult and challenging part of the flight.”
Interview at The New Space Race (August 2007) http://library.thinkquest.org/07aug/00861/armstrongiscool.htm
Context: The exciting part for me, as a pilot, was the landing on the moon. That was the time that we had achieved the national goal of putting Americans on the moon. The landing approach was, by far, the most difficult and challenging part of the flight. Walking on the lunar surface was very interesting, but it was something we looked on as reasonably safe and predictable. So the feeling of elation accompanied the landing rather than the walking.
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Neil Armstrong 32
American astronaut; first person to walk on the moon 1930–2012Related quotes

“Sometimes the darkest challenges, the most difficult lessons, hold the greates gems of light.”
Source: Family of Light: Pleiadian Tales and Lessons in Living

“In a revolution, as in a novel, the most difficult part to invent is the end.”
Recollections of Alexis de Tocqueville, p. 71 http://books.google.com/books?id=3gtoAAAAMAAJ&pg=PA71&dq=%22most+difficult+part+to+invent+is+the+end%22.
1850s and later

Quoted on BBC News, "Flight MH370 'crashed in south Indian Ocean' - Malaysia PM" http://www.bbc.com/news/world-asia-26716572, March 24, 2014.

Louis Friedman — reported in David Montero (July 23, 1998) "Alan B. Shepard: 1923-1998 - A man of the heavens First American in space, moon golfer dies in sleep", Ventura County Star, p. A01.
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“I hold that the parentheses are by far the most important parts of a non-business letter.”
Letter to Blanche Jennings (15 April 1908), Letters of D.H. Lawrence (1979), edited by James T. Boulton