Some of the students of Sheikh Najm al -Din Abi Al -Hassan presented to him with a message in logic that he called it with the eye and asked him to add a message to it in the natural and divine science and did not want to reject this request to them despite the lack of purity of his mind at this time, so he presented a message divided into two parts, the first in the divine and the second in Naturally indicates all the rules of these two flags. This is what the investigator in this book is eating from the original manuscript, so that the contents of the two letters in this book will reach us.