Unity of existence in Mulla Sadra's idea

One of the basic Sadrian mystics and philosophers opinions is the unity of existence .The most important issue in Islamic philosophy that has been discussed after discussion on principality of existence, and caused to form various sects of philosophical and mystical. Mulla Sadra, the great philosopher of 16th century, also is one of the herald unities of existence. And after Jami is the only one that has become famous in this theory and according to many thinkers, he had been influenced by Ibn arabi.
In his great book,( Al-asfar-al Arbae), he regarded existence according to proof, like phahlavi philosophers gradational,(tashkiki) i.e oneness reality that has different degrees .He in the same book(second part of first trip) manifested his final opinion in unity of existence on the basis of talent and mysticism, and has approved the individual unity of existence. So, he has named existence of possibilities ,dependent being. that whole are the reflex of one reality and the thought of independence and multiplicity of them is not real. In the end he has causation to dignity .In this research author has tried to obtain final theory of Mulla Sadra and to show oneness of unity of existence by hikmat-al motaliyah and mystical unity of existence.