My seven-year-old son Isaac was listening to Gil Roth’s interview with me on the Virtual Memories Show. “He will be dead from prostate cancer within the next two years,” Roth said in introducing me. “You’re dying?” Isaac cried. Isaac is named after Isaac Rosenfeld, of whom the critic Ted Solotaroff said that “his very name itself still seems to possess an incantatory power: some of his friends speak it as though ‘Isaac’ were a magic word for joy and wit. . . .” My son to...