David of Augsburg

His major work, written in the 1240s, is entitled ''The Composition of the Interior and Exterior Man according to the Triple states of Beginners, Proficient, and Perfect''. It is composed of three different treatises whose dates and relationships are difficult to determine. It was popular, since close to 400 manuscripts of the whole or parts survive, along with numerous translations.
He also composed various vernacular texts in Middle High German (24 are known, though at times doubt has been cast on the veracity of the attribution). The most notable of these are ''The Seven Stages of Prayer'', and ''Concerning the Manifestation and Salvation of the Human Race''. Provided by Wikipedia