Sheikh Sadi was a great poet. He used to put on a simple dress. Once he took shelter in the house of a nobleman. The nobleman could not recognize him and treated him as an ordinary man. The people of that house did not deal well with the poet. Rather they showed disrespect and dishonour to him. The poet left the nobleman's house. A few days later, he went there again putting on a gorgeous dress. This time he was respected and honoured by the people of the rich man's house. They gave him rich food to eat. The poet did not eat the food but he began to put the food in his pocket. Seeing it, the rich man was astonished. He asked the poet about such behavior. Then the poet said, "This food is for my dress but not for me. Had it not been so, I would have been treated in the same manner when i was very poorly dressed. " The rich man was really sorry for this. He begged apology for his previous behavior.
Saadi it's a great poet, not just in Persian Poetry culture but in the rest of the culture.