Massage
One of the greatest Persian medics was Avicenna, also known as Ibn Sina, who lived from 980AD to 1037AD. His works included a comprehensive collection and systematisation of the fragmentary and unorganised Greco-Roman medical literature that had been translated Arabic by that time, augmented by notes from his own experiences. One of his books, "Al-Qānūn fī aṭ-Ṭibb" (The Canon of Medicine) has been called the most famous single book in the history of medicine in both East and West. Avicenna excelled in the logical assessment of conditions and comparison of symptoms and took special note of analgesics and their proper use as well as other methods of relieving pain, including massage.
Seddiqin argument
Avicenna focuses on the view that God is a necessary being in itself. This argument is based on contingency. The claim of Avicenna is that we can establish the existence of God directly by consideration of his existence itself. In other words in the proof of sincere, Avicenna tries to reach the existence of God just through an analysis of existence itself along with the supposition that God is the necessary existent. According to him, if we reflect on any things generally and consider only to its existence, then the existence is either necessary or not. If the existence is necessary then it is God-Avicenna call it (al-Wajib al-wujud) and if the existent is not necessary then it is impossible or contingent. It is not impossible because we assume that it is something therefore it must be contingent. In fact, if we consider the existence of existent alone then it is either the necessary or contingent. The contingent, in respect to its existence, needed ab alio or something which brings it into existence. The preponderant itself is necessary or contingent. If it is necessary, then it is God. If it is contingent, then it is in need of a transcendent cause. The series of these transcendent causes themselves are finite or infinite. The finite series finally arrives to God since that the last member doesn't need to any cause and therefore itself is by definition the Necessary Existent. If the series would be infinite then series as a whole needed to its components in its existence and therefore is contingent.