Unity of Man and God in Mollavee school.s and Atman and Brahman in Vedantism

Human understanding and unity with God is one of  topics that is very important.in Hindu mysticism especially Vedanta school and Islamic mysticism particular Masnavi. In this paper, We investigated the expression of factors and obstacles to achieve unity.And the use of the Hindu scriptures and commentaries written on Masnavi of Rumi and after review the main elements of the unity in Vedanta school ;Atman and Brahman and man and God in Masnavi . Superior knowledge or intuition, self-knowledge and the benefit of the teachings of theGuru or old , are common ways to connect with the Absolute Truth between Two mysticism.In addition to these factors , Rumi expressed the factor of love that ,Shankara, particular main exponent of Vedanta school, less than attension to it.The factors such as, apparent knowledge or lower, Ignorance or Avydya, Maya or illusion, are Causes that Man stopped coming to God And seeker With the benefit of factors And pass from  Obstacles ,Can be achieved unity with God.present research is a descriptive comparative study and data are analyzed and  using a content analysis method in a library method