"The samhita (compendia) of Ayurveda are written in Sanskrit...They were propagated through centuries initially by word of mouth through the guru-shishya parampara (teacher–pupil tradition). For making the propagation easy, Ayurveda was written in the form of sutra (stanza) which concise yet precise versions of text, easy to memorize but unfortunately subject to different interpretations. Thus the samhita underwent considerable additions, modifications and editorial revisions from time to time."