 We have read above that physics aims not only at sensible objects (above,), but also spiritual ones—which allows us to introduce Avempace’s book on the Soul. The book was edited (IB-S1a) and translated by Muhammad Saghir Hasan al-Ma‛sumi (IB-S1e) who unfortunately could use only the Oxford manuscript; the Berlin manuscript is longer although its composition is less coherent. In 2007 J. Lomba Fuentes used both manuscripts for his Spanish translation (IB-S-lomba) as D. Wirmer has done for his German version (IB-S-Wirmer).