The piece of evidence from paragraph 7 best reveals Diaz's constant fear is  "An awful withering dread that coiled around my bowels -- that followed me into my dreams."
DÃaz is known to describe fear in paragraph 7 as  He compares it to a that of seeing the ghost.
Note that Fear was said to have tormented and controlled DÃaz until he no was no longer allowed  to have full control of him.
Hence he made the statement that "An awful withering dread that coiled around my bowels -- that followed me into my dreams."
Therefore, The piece of evidence from paragraph 7 best reveals Diaz's constant fear is  "An awful withering dread that coiled around my bowels -- that followed me into my dreams."
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