Make A Virtue Of Necessity Meaning

(idiomatic) To make the best of a difficult situation; to recast or portray an action or situation in which one has no alternatives as an action or situation which was deliberately chosen on its merits.

Example: c. 1595, William Shakespeare, Two Gentlemen of Verona, act 4, sc.1:
  Indeed, because you are a banish'd man,
  Therefore, above the rest, we parley to you:
  Are you content to be our general?
  To make a virtue of necessity
  And live, as we do, in this wilderness?
1906, George Bernard Shaw, Major Barbara, Preface:
  Nietzsche, as I gather, regarded the slave-morality as having been invented and imposed on the world by slaves making a virtue of necessity and a religion of their servitude.