I saw a great eagle, flying towards me from the altar. And he said to me: "If you wish to become one, then prepare yourself." And I fell to my knees and my heart longed terribly to worship that One Thing in accordance with its true dignity, which is impossible--I know that, God knows that, to my great sadness and burden. And the eagle turned, saying, "Righteous and most powerful Lord, show now the powerful force of your Unity for the consummation with the Oneness of yourself." And he turned back and said to me, "He who has come, comes again, and wherever he never came, there he will not come."
Hadewijch