How do negative connotations used in writings help to support an author’s purpose

Appropriate diction is important because the author’s or character's attitude is often expressed through the words and details he or she selects.

For example, sad stories are usually written with words containing negative connotations which includes various words that describe feelings, judgments, or opinions to the reader.  

Some negative connotations are likely to include experiences, senses, feelings, and thoughts to convey in an effective way to the reader.

faithful servants eumaeus and philaetius:

his ragged vest then drawn aside disclosed the sign conspicuous, and the scar exposed: eager they view'd, with joy they stood amazed with tearful eyes o'er all their master gazed:

these servants know ulysses by the scar he got when he was a child - so when he showed them the mark, they immediately knew this is truly their master and they hugged him, finally starting to believe his words.

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