Saadi's "Golestan" Saadi's "Golestan"

You should make it clear that this is a title (especially since "Golestan" is also the name of a province). Quotation marks will let you do that. (You could also use italics, but not at LangCorrect.)

The Persian language is filled with great poets who are world k-renowned. The Persian language is filled with great poets who are world-renowned.

Or "known around the world".

However, my choice would be "Golestan" by Saadi Shirazi. However, my choice would be "Golestan" by Saadi Shirazi.

The book was chosen by the Times Magazine as one of the 1000 great booksest of all time. The book was chosen by the Times Magazine as one of the 1000 greatest of all time.

Since you've already used "book" earlier in the sentence, you can omit it later, which sounds better.

He is called Shireen Zaban, i.e.that is, someone who has a sweet language. He is called Shireen Zaban, that is, someone who has sweet language.

It's better to use "that is" for "i.e." and "for example" (or "for instance") for "e.g." in a formal context where space is not limited.

Reading his poems makes you feel as if you are sitting by a passing river and listening to the voices of water and birds. Reading his poems makes you feel as if you are sitting by a passing river and listening to the voices of water and birds.

Or "as if you were sitting". This is called the subjunctive, and is a little better than the indicative in a formal context where you want to indicate that something is contrary to fact.

Most of Saadi’s works are a collection of poems, but "Golestan" is an exception. Most of Saadi’s works are a collection of poems, but "Golestan" is an exception.

A comma makes the sentence flow better.

"Golestan" is composed of random,[,] short stories that are full of human advice and interesting narratives. "Golestan" is composed of random[,] short stories that are full of human advice and interesting narratives.

Whether you use a comma here depends on whether you're talking about stories that happen to be short, or stories that fit the technical term "short stories".

Many experts have considered the language used in "Golestan" the prime of the Persian language. Many experts have considered the language used in "Golestan" the prime of the Persian language.

It has been decadcenturies since Saadi’s death and during this time, many writers have attempted to imitate Saedi’s style but most of them either have been unsuccessful or could have not surpassed him. It has been centuries since Saadi’s death and during this time, many writers have attempted to imitate Saedi’s style but most of them either have been unsuccessful or could not surpass him.

According to Wikipedia, the book was written in 1258, so "centuries" is more appropriate than "decades".

I would choose this book because I would like to change Iran’s picture in people’s minds, even if only a little. I would choose this book because I would like to change Iran’s picture in people’s minds, even if only a little.

"Golestan" is a good representative of Iranians’ culture and behaviors. "Golestan" is a good representative of Iranians’ culture and behavior.

"Golestan pictures" not only depicts Iranians’ love for literature, but paints a reasonable picture of their moral codes. "Golestan" not only depicts Iranians’ love for literature, but paints a reasonable picture of their moral codes.