Explanation: <em>Detect</em> and <em>perceive</em> are pretty objective, neutral words describing the action of getting to know something rather passively, and <em>find</em> is the result of an active process (searching), but it has no negative connotations. Snoop implies looking, detecting and trying to find things, but in a sneaky, intrusive way; it will carry the negative connotation of spying in most contexts.
What is the symbol in this passage? In this passage, the symbol is Caesar's statue run with blood like a fountain while many Roman people were smiling and washing their hands in his blood. Her dream foreshadows a negative event and symbolizes Caesar's death.
In "The Tell-Tale Heart," the narrator claims to have killed the old man because he hated the appearance of the man's eye. However, his murderous actions are actually a reflection of his madness. The reasoning behind the narrator's crime undermines his argument that he is sane and proves his mental instability.