expecto patronum

• harry potter'ın 3. filmde devasa bir şekilde yaptıgı buyudur.5. filmde ise bir ogretmen edasıyla arkadaslarına ogretmiştir.
  
  --- spoiler ---
  'just remember, your patronus can only protect you for as long as you stay focused, so focus!' 'make it a powerful memory, the happiest you can remember, allow it to fill you up.' 'working hard is important, but there's something that matters even more, believing in yourself.
  --- spoiler ---
  
  http://www.youtube.com/watch?v=sb4ahpngefi