Literary devices provide a freshness to literature that embellishes meaning and expression and enjoyment.
1. In the opening of the play A Midsummer Night's Dream, Theseus, the Duke of Athens, personifies the moon, giving it the ability to see (behold),
And then the moon, like to a silver bow
New-bent in heaven, shall behold the night [personification]
Of our solemnities. (1.1.9-11)
2. There is also a simile in these lines a the moon is compared to a silver bow using "like." Similes make comparisons using the words like or as.
Another simile appears in Act II when Helena begs Demetrius not to run away from her even though, as she declares, "No, no , I am as ugly as a bear...." (2.2.21)
3. Later in this second act, Lyslander speaks and uses a metaphor, an implied, unstated comparison between two unlike things. In this scene, Lysander denies that he loves Hermia, and says that he loves Helena instead,
Not Hermia but Helena I love:
Who will not change a raven for a dove?
The will of man is by his reason sway'd
And reason says you are the worthier maid. (2.2.116-119)
Hermia is compared to a raven, while Helena is the dove. Another metaphor comes a few lines later:
And leads me to your eyes, where I o'erlook
Love's stories, written in Love's richest book. (2.2.125)
4. In Act III, there is alliteration, the repetition of beginning cosonant sounds. Here it the /s/. Alliteration makes a line seem faster.
Sever themselves and madly sweep the sky,
So, at his sight, away his fellows fly;(3.2.24-25)