How are denotation and connotation applied in the writing process

Denote is what the word itself says and connote is the supposed meaning that might or can be brought up of that word.

Explanation:

When a word denotes, that means it is exactly what the word itself means and not something or any emotional association it might arouse in the reader.  

But when we say connote or connotation, it is quite the opposite of denote. Connote means the emotional or other explanation of the sentence or word. It is the feeling or imagination that comes up when one thinks of a word or a sentence.

taking into account that a theme is the central topic a text treats and can be developed through a story, play, poem etc. the following are themes that can be further developed:  

my best friend jeffrey has many unusual interests. (the story could be about each of the unususal interests)

once a man gives his soul over to evil, he can never go back. (this could be a saying or a proverb)

the three sheepdogs lay around the yard all day. (it could be developed detailing how each of these sheepdogs lay around)

a priest's collar has an unusual effect upon people. (it could be developed detailing the different effect upon people)

innocence is a powerful force in a world full of corruption. (it could be developed detailing how is a world full of corruption)

king lear is a play shakespeare wrote later. (it is just a sentence and doesnt give any idea or topic to be discussed in details.

evil often wears the disguise of innocence. (this could be a saying or a proverb)