Because the tree started to get very old and they didn’t want the tree to rot
The language that Shakespeare used was significantly different from the English we use nowadays. This can sometimes complicate the reading of his works. Many words that were used in Elizabethan English are no longer in use. Some other still exist, but its meaning and connotation have changed.
Moreover, the Elizabethan alphabet contained 24 letters, less than the 26 we use nowadays, and some of these had slightly different pronunciations.
They had effort into it, and make it look interesting to catch a person's attention to read the book and they us ally write powerful stories.
A word-for-word reference to a text is called a direct quotation.