What is the author's style in Late and Deep by Paul Celan?

Late and Deep is a disturbing poem, dealing with the recent memory of the Holocaust, of Jewish history through the ages, and of the constant pressure for conversion to Christianity that Jews have faced from ancient and medieval times up until the present. It is a poem that seems to affirm an oath or prayer but that ultimately undercuts its own promises. The poem is characterized by allusions to Christian and Jewish scripture and history, and it seems to beckon forward and backward, from the time of the Exodus from Egypt, up to the Holocaust, in a never-ending saga of oppression, faith, and the futility and the barrenness of that faith. Celan is a Jew, writing in the German language of his people's oppressors, but he is a Jew who has lost faith in a personal God, making this poem bitter in its renunciation of hope.