Forever is composed of nows—
Nows—capitalized
Dickinson capitalizes **Nows** to make the present moment a concrete thing, not an abstraction. She's building eternity from units you can hold.
latitude of home
**Latitude** means both geographic location and freedom of movement. Eternity differs from time only in scope and space—it's structurally identical.
dissolve, exhale
Watch the verbs soften: months **dissolve** (liquid), years **exhale** (breath). Time becomes less solid as the thought experiment progresses.
certificate
**Certificate** means official documents—birth records, marriage licenses, death notices. Remove bureaucracy and time becomes unmeasurable.
Anno Domini's
**Anno Domini** = 'in the year of our Lord,' the Christian calendar system. She's saying our years could be as infinite as Christ's era if we stopped counting them.