Here's why:
* Oxymoron: A figure of speech that combines two contradictory terms to create a surprising and thought-provoking effect.
In this case, "devilish" and "angel" are opposites. By juxtaposing them, Juliet highlights the complex and contradictory nature of her feelings for Romeo. He is both alluring and dangerous, both a source of joy and fear.
The oxymoron effectively captures the tension and turmoil within Juliet's heart as she grapples with the consequences of her love for Romeo.