For ten points, identify this author of encyclopedias "Al Shefa" on healing and "Al Nadja" on deliverance, an ethnic Persian who also wrote a Canon of Medicine, the authoritative medical text for centuries after.
He wrote on pantheism in his now-lost "Philosophia Orientalis", and he divided being into three classes: the merely possibly, the possible endowed with necessity by the third class, and what is of its own nature necessarily, the First Cause. For ten points, identify this author of encyclopedias "Al Shefa" on healing and "Al Nadja" on deliverance, an ethnic Persian who also wrote a Canon of Medicine, the authoritative medical text for centuries after.
He wrote on pantheism in his now-lost "Philosophia Orientalis", and he divided being into three classes: the merely possibly, the possible endowed with necessity by the third class, and what is of its own nature necessarily, the First Cause.
{Avicenna} or Abn Ali al Hosain ibn Abdallah ibn Sina