Marie-Louise von Franz describes in her introduction to Ibn Umails "Book of the Explanation of the Symbols — Kitāb Ḥall ar-Rumūz" the contributions of Islamic alchemy as follows: In the 7th to 8th century, Islamic scholars were mainly concerned with translating ancient Hermetic-Gnostic texts without changing them. Gradually they began "confronting their content with the Islamic religion" and began "to think independently and experiment themselves in the realm of alchemy". Thus they added "an emphasis on the monotheistic outlook" (tawḥīd) and more and more creating a synopsis of the diverse antique traditions. Thus unifying their meaning, the Islamic scholars arrived at the idea, that the secret and aim of alchemy were the achievement of "one inner psychic experience, namely the God-image" and that stone, water, prima materia etc. were "all aspects of the inner mystery through which the alchemist unites with the transcendent God". Secondly, they added "a passionate feeling tone" by using much more a poetic language than the antique Hermetists did, also giving "a greater emphasis on the coniunctio motif", i.e. images of the union of male and female, sun and moon, king and queen etc. "The mystical masters of Islam understood alchemy as a transformative process of the alchemists psyche. The fire which promoted this transformation was the love of God."