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In this research it has been tried to present certain similarities of thoughts in the poetical works of two great Iranian poets, i.e. Ferdosi and Sa‘di. An attempt has also been made to explain the basic trends and features of life along with the immortality of human soul
Based on a comparative study; various evidence has been extracted out of their works. These two outstanding poets have had quite similar viewpoints and attitudes toward the fundamental phenomena of human life in three dimensions. They are: man‘s duty toward God; man‘s duty toward himself and others; man‘s duty toward his society. From their points of view, happiness and hardships are exactly the just results of man‘s deeds. Considering their holy ideas is absolutely essential to us in the world today.