Simulation is a Greek word, was established by Aristotle in his book (The Art of Poetry) where he offered the principles of simulation by reaching that tragedy in action simulation and not only similarity in imitation that is why it entail selection, arrangement and events illustration that reveal the relationship between art and life? simulation finds that art is a direct mirror to life ?simulation theory illustrated in three trends simple simulation, core simulation and ideal simulation. On the other hand tendency formalism shows that exact art separates entirely from actions and themes that make up the usual experience. Art is a freestanding science that does not require repeating life as art. When the simulation theory moved to the Arab Monetary, it scrubbed and gained the status of Islamic realism that do not conflict with the principles of the mind and spirit longings but we find that tradition faddish life and follows it, that is why it includes period of time (occurred at certain time and ended) while decoration totally lack period of time and gained constancy character. While decoration knows nothing except stability and immortality. So simulation, non-simulation, ordinary, decoration, shaping and geometry are all considered Expression of two major patterns of human expression patterns linked very closely to the position of the artist and his community towards the environment he lives: the first pattern has the time period trait ( beginning & ending)that leads to meaning while the second illustrate stability and expansion that has constancy and immortality connected to intuition In general Arab Islamic art falls within the non-simulation arts acquired from the influence of Islam decisive basic characteristics, a characteristic which had a far-reaching aesthetic charm on the reviewers from within the Islamic world and beyond Which made the Arabic language subject to the requirements of the new reform and though spread throughout Asia and eradicated the old dialects and ruled out. Artist Ebadi Hafez has said "I try to keep the core values of the letters which leads me to art by its role, united spirit of the Arabic script with the movement in art the spirit of the Arabic letter is united with the progress in art " that is why we noticed that most of his work with Arabic letter is documented on walls in Paris and Europe. He assures that his use to the calligraphy in Europe countries is relations establishment between east and west that required the presence of bilateral awareness of the importance to build a coherent world. From here our research problem is raised for the need of the letter element in clarifying the fundamentals of fine arts that assure its value and concepts.