Avicenna - The Canon of Medicine - Cause not effect diagnosis
Type of spiritual experience
A description of the experience
Avicenna (1999). The Canon of Medicine (al-Qānūn fī'l-ṭibb), vol. 1. Laleh Bakhtiar (ed.), Oskar Cameron Gruner (trans.), Mazhar H. Shah (trans.). Great Books of the Islamic World
That which is speculative named theory relates to the formation of opinions and the showing of the evidence upon which they are based, without reference to the mode of acting upon them.
Thus this part deals with the temperaments, the humors, the drives, and with the forms, the symptoms, and the causes of disease.
That which is specially named practical relates to the mode of acting upon this knowledge, and the prescription of a regimen