The people who follow this tradition of oral recitation where trained from childhood in a special school (kind of boarding) where certain values facilitating th

The people who follow this tradition of oral recitation where trained from childhood in a special school (kind of boarding) where certain values facilitating the lossless transfer of meaning like truthfulness, honesty etc, were imbibed deep into students. It was strictly not allowed to edit (add or subtract) the original verses( if one does so he/she can write another book). After certain years has passed by, only those who were capable enough and 'morally' qualified were authorised to become teachers and pass on the knowledge. Even today in some places in India(not so rampant as in like 100 years ago) the same culture is followed.