How does 'My life closed twice before its close' connect details of personal history to ideas about eternity?

Emily Dickinson's poem "My life closed twice before its close" explores the theme of mortality and eternity by depicting how the speaker experiences two significant losses that feel like death before her actual physical death. Through these personal experiences, Dickinson raises existential questions about the nature of life and the continuity of existence beyond death, suggesting that our personal histories can offer glimpses into the eternal aspects of human existence.