The Friar tells Romeo to be more explicit in his communication because the Friar does not understand or comprehend how it is possible for Romeo to quickly forget about Rosaline given that he was recently head over heels with her.
In the play "Romeo and Juliet", Friar Laurence is the character (who is neither a protagonist nor an antagonist) whose role is the part of a wise adviser to Romeo and Juliet.
The author uses his character to foreshadow the tragic events of the play using his soliloquy.
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