“Old traditions will break, old empires will fall, a new Dharma will be established, and a new age will begin.”
Traditions are like the fruit of the mango tree. At the time of their birth they taste bitter to everyone; a little later they turn sour, and one to whom sourness is dear accepts them; and after some more time they begin to taste sweet and become dear to all. But once a certain time has passed, the fruit rots; a foul smell begins to rise from it, Mahamahim, and whoever draws near is struck with disease; and in the end only the dry stone of the fruit remains, of no use to anyone.
"And who decides which tradition has rotted?
Chapter 28 of 35 — a single teaching, 4 min in total.
The Mahabharat is a record of customs at different stages of ripeness. Some are shown working — the obligations of hospitality, the counsel owed to a king. Others are shown having outlived whatever they were for, and the epic is willing to let them be broken: Bhishma's vow is honoured to the letter and is a catastrophe.
The test the story keeps applying is not age but whether the practice still does the thing it was for. A tradition is not defended in the Mahabharat by being old, and it is not dismissed for being old either.