What do you mean by original diction?

Diction (/ˈdɪkʃᵊn/; Latin: dictionem (nom. dictio), "a saying, expression, word"), in itso riginal, primary meaning, refers to the writer's or the speaker's distinctive vocabulary choices and style of expression in a poem or story.

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i would say that these are the two thesis statements best for a literary analysis essay on recurring themes in shakespeare's romeo and juliet:

1.  in romeo and juliet, shakespeare demonstrates that love comes in a variety of forms, be it romantic, familial, or between friends.

2.  shakespeare explores the struggle for identity through the character of juliet in his play romeo and juliet.

the other theses aren't reoccurring in this play. 

explanation:

pulling in the reader is important