The Greeks called that sudden understanding anamnesis. Literally, “the forgetting of the forgetting.” A powerful sense of remembering. Nineteenth century psychologist William James experienced this during his Harvard experiments24 with nitrous oxide and mescaline, noting it’s “the extremely frequent phenomenon, that sudden feeling . . . which sometimes sweeps over us, having “been here before” as if at some indefinite past time, in just this place . . . we were already saying just these things.”
