What is the difference between strategy and mission?

MISSION is the way your organization wants the world to be, the reason for which it does exist (defeat hunger, to serve and protect every abused woman, bring health facilities where needed). STRATEGY is the organization's long term plan to make the mission something real and tangible, even not yet focusing on what you're going to do day-by-day, it's the path you decide to walk for the next 3-5 years.