In Act 2 Scene 2 2 , Juliet declares:
O' Swear not by the moon, the inconstant moon,
That monthly changes in her circled orb,/ Lest thy love prove likewise variable.
Why doesn't Juliet want Romeo to swear by the moon?
It changes too often
O She prefers the sun.
It's too constant and predictable.
O She does not want Romeo to pledge his love at all.
it changes too often; in reality she is asking him to swear on something that is consistent, not inconsistent. Now, we both know that the moon changes throughout the month, but Juliet wanted consistency.
