“Grief is among other things a loss of rhythm,” remarks Patrick Bringley in All the Beauty in the World. This one-performer drama, now on the miniature stage of DR2, is based on Bringley’s 2023 memoir of the same title. Both play and memoir explore the emotional life of a man in his mid-20s, sensitive and erudite, seeking solace in art and isolation following his older brother’s death. When “you lose someone, it puts a hole in your life,” says Bringley (making his theatrical debut playing himself), “and for a time you huddle down in that hole.”