His parents were Catholic and his older brother was a priest, but after studying in Japan he had a crisis of faith and only returned to Catholicism later in life.
His efforts to publish his poetry just after the end of the Second World War were met with resistance from the Communist authorities and he fled to the south.
He also served as editor-in-chief of The Yeongnam Ilbo, editorial writer for the Kyunghyang Shinmun, and as a lecturer on poetry at Chung-Ang University.
His work is concurrently grounded in his Christian faith, which offers the poet a perennial source of personal repentance.
Thus Ku's work is immersed in the poet's search for a poetic aesthetic that arises from a solid ontological foundation.
Thus the poet's stance manifests itself vividly in his collection of poetry entitled Wasteland Poems (Chotoui Si).
Though Ku grounds his poetic undertakings in his firm Christian faith, he also embraces a wide variety of other spiritual and religious influences.