The sources

Leaping Poetry: An Idea with Poems and Translations

Bly, Robert · Boston: Beacon Press, ; first published in The Seventies · 1975

Conceptual debt, via Joseph Fasano: the ‘leap’ between conscious and unconscious thought.

Cited in

Bly, Robert. Leaping Poetry: An Idea with Poems and Translations. Boston: Beacon Press, 1975; first published in The Seventies, 1972. (Conceptual debt, via Joseph Fasano: the 'leap' between conscious and unconscious thought.)