The Day she goes — Romeo and Juliet

The Day she goes 1
Or Day she stays
Are equally supreme-
Existence has a stated width
Departed, or at Home-
(F.1302/J.1308)
[1] She:: Juliet. The Day She goes:: the day of her death.
[2] Day she stays:: every day of her life.
[3] supreme:: a) highest quality, degree; b) last, final, as belonging to the moment of death (OED supreme 5). Living is wonderful; death is the final, not supremely good.
[4] Existence:: life, the state of existing. stated:: settled, established, fixed.
[5] Departed:: deviated, desisted, abandoned. at Home:: cozy, relaxed.