The greatest teachers, such as Buddha, Jesus, Mohammad, etc.. never wrote anything down.
Because they never answered questions. Only persons.
Never took an answer for rocket scientist and gave it to a farmer.
Nor for a farmer and gave it to a brain surgeon.
They realize capacities of their audiences.
The recording of the master answering Mr. Harry Machine Gun Juliana back in 502BC wasn’t meant for anyone else, but Harry Machine Gun Juliana.
Not for me, you or anyone else.