Please answer the following question: Given the following passage  "According to Vetter, the description of the Buddhist path may initially have been as simple as the term "the middle way". In time, this short description was elaborated, resulting in the description of the eightfold path.",  answer the following question. Note that the answer is present within the text.  Question: Details of right samadhi are not offered by __
A:
the eightfold path