To support the idea that Emily Dickinson felt more connected to the dead than to the living, you can use sentence 5 from the essay by Carole Jenkins: "In her latter years, she wore only white and would not let anyone but her family see her."
This sentence implies a significant level of isolation and a possible connection to themes of death, as wearing white can symbolize mourning or a connection to the afterlife. It indicates her detachment from the living, thereby suggesting a deeper connection to death.