article_snippet: Castro's prison love letters to Ms Revuelta are one of the few glimpses into his closely guarded emotional side: 'I am on fire.
article_snippet: The rebel and Diaz-Balart divorced, in part because one of his letters to Ms Revuelta was mistakenly delivered to his wife.
article_snippet: Castro's rarely seen emotional side is visible in letters to Ms Revuelta from prison in which The future Cuban leader says The future Cuban leader is 'on fire.'
highlights_snippet: Rebel would write socialite passionate letters during his prison time .
  