many things I knew, I have forgotten; many things I thought I knew, I find I know nothing about; some things I know, I have found not worth knowing; and some things I would give - O what would one not give to know? are beyond the reach of human ken.
Anna Letitia Barbauld, Lucy Aikin (1825). “The works of Anna Laetitia Barbauld: in two volumes”, p.148
