Wind At One's Back Meaning

(idiomatic) Forward momentum; a boost in one's prospects for success due to favorable events or circumstances.

Example: 1997 April 7, Andrea Adelson, "Broadening the Appeal of Classical Music Radio," New York Times (retrieved 3 July 2015):
  And the Tulsa symphony credits the station with reversing a decline in ticket sales among younger patrons. "We've got the wind at our back," Mr. Cohn said.
2008 April 23, Amy Sullivan, "A Primary with No End," Time (retrieved 3 July 2015):
  Most of the rational world . . . foresaw a smooth ride to victory for Democrats. They had, after all, the wind at their backs from the 2006 midterm elections.
2010 Dec. 16, Xan Brooks, "Film: When the alpha nerds kicked ass," Guardian (UK) (retrieved 3 July 2015):
  Like the cowboys, cavalry men and settlers of old, the new-model nerd has the wind at his back and a kingdom to claim.