Note that you must capitalise the word "I" every time you write it but don't capitalise "you" unless it's at the start of a sentence or the start of a quoted sentence.
Also note that thread titles should include some/all of the words you are querying. A good title for this thread would have been "The spirit of those dead".
Your sentence is not wrong but I would probably say "The spirit of the dead lies in the memory of the living."
Student or Learner