An excerpt from “Sabbath”: In December 2014, I completed my memoir, “On the Move,” and gave the manuscript to my publisher, not dreaming that days later I would learn I had metastatic cancer, coming from the melanoma I had in my eye nine years earlier. I am glad I was able to complete my memoir without knowing this, and that I had been able, for the first time in my life, to make a full and frank declaration of my sexuality, facing the world openly, with no more guilty secrets locked up inside me. In February, I felt I had to be equally open about my cancer — and facing death. I was, in fact, in the hospital when my essay on this, “My Own Life,” was published in this newspaper. In July I wrote another piece for the paper, “My Periodic Table,” in which the physical cosmos, and the elements I loved, took on lives of their own. And now, weak, short of breath, my once-firm muscles melted away by cancer, I find my thoughts, increasingly, not on the supernatural or spiritual, but on ...