We are all faced with a series of great opportunitiesö brilliantly disguised as insoluble problems.

-Gardner,JohnWilliam
Quoted in Reader's Digest, Mar1966.

Life should serve up its feast of experience in a series of courses.

-Golding, Sir William (Gerald)
  Close Quarters.

Un homme n'est rien d'autre qu'une se¤  rie d'entreprises. A man is no other than a series of undertakings.

-Sartre,Jean-Paul
  L'Existentialisme est un humanisme (Existentialism and Humanism,1948) (translated by Philip Mairet).