The context clues indicate that the meaning of the phrase “I am too busy sharpening my oyster knife" is that she's too focused on her optimistic search.
It should be noted that context clues are the hints that are given in a literary work.
In this case, the the meaning of the phrase “I am too busy sharpening my oyster knife" is that she's too focused on her optimistic search for a happy and positive life.
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