William Blake writes the quoted lines

Date (happened)

c. 1751 (possible)

passage 553056 (lecture nid 2100), 'the great mystic, William Blake, wrote almost two hundred years ago'

Told / reported

c. July 1951 (probable)

passage 553056 (lecture nid 2100), opening dateline 'Radio Talk, Station KECA, Los Angeles (July, 1951)'