* It is a profound philosophical question. The question of whether it is better to live or to die is one that has been pondered by philosophers and theologians for centuries. There is no easy answer, and the quote reflects this complexity.
* It is a universal human question. Everyone, at some point in their lives, has wondered whether it would be better to end their lives. The quote speaks to this universal experience and makes people feel less alone in their struggles.
* It is beautifully written. The quote is a perfect example of Shakespeare's mastery of language. The words are simple and direct, but they are also powerful and evocative. The rhythm and flow of the language make the quote easy to remember and recite.
* It has been used in countless works of art and literature. The quote has been referenced and parodied in countless works of art and literature, from paintings and sculptures to films and TV shows. This has helped to spread its fame and make it a part of popular culture.
Overall, the quote "to be or not to be, that is the question" is famous because it is a profound philosophical question, a universal human question, beautifully written, and has been used in countless works of art and literature.