"Fons Vitæ", originally written in Arabic under the title "Yanbu' al-Hayat" () and later translated into Hebrew by Ibn Tibbon as , , lit. "Source of Life", (cf. ) is a Neo-Platonic philosophical dialogue between master and disciple on the nature of Creation and how understanding what we are (our nature) can help us know how to live (our purpose). "His goal is to understand the nature of being and human being so that he might better understand and better inspire the pursuit of knowledge and the doing of good deeds." The work stands out in the history of philosophy for introducing the doctrine that all things, including soul and intellect, are composed of matter and form, and for its emphasis on divine will.