Perhaps it was Hegel who said “Without contraries there can be no progress.” Sounds like his dialectic anyway.
As well, in the I Ching the most “favourable” hexagram is the one where everything is out of its place – where maximum movement is possible. The least favourable is where all lines are precisely in their proper place. This latter condition is a condition of stasis. Not a place where visionaries and the brave want to be.