Persian Language is one of the most lively languages in the world which is full of ethical & mystical teachings. It is not an exaggerated saying to say that the Persian language is one of the richest languages of the world, and literary works of poets such as Ferdowsi, Khayyam, Nezami, Khaghani, Molavi, Sa’di, Hafiz, etc. are among the treasures of Iran which are immortal. Regarding poetry and mysticism we can claim that the Persian language is superior to other languages. Khayyam is one of the greatest Persian language poets who was skillful in various scientific fields. However, regarding the fact that we have no exact and thorough information of his life, and interpreters have guessed about his life, faith, beliefs and his thinking paradigms through his Rubayis, we intend to examine such issue by relying on his Rubayis. The present research examines Khayyam’s thoughts in the shadow of his poems.