BACHYE'S "Guide to the Duties of the Heart" is the unique work that first linked the ethical science of the West with the emotional and spiritual morality of the East. It combines, in an artistic unity, elements 
drawn from the philosophy and contemplative mysticism of the Arabs, from Biblical and Rabbinic Judaism, and from Greek thought. By exhibiting the spiritual foundations of universal Ethics, and of the moral 
law of the Bible, in the light of pure reason, Bachye prepared the way for finding that common ground on which, wholly or in part, all the moral religions, and all the non religious systems of morality, are rooted.