Only the bad that they have said about those who came before them. People will remember what they have destroyed of others' theories, but the theories they construct themselves will inevitably be destroyed and even ridiculed by those who come after. That is the law of science. Poetry does not have a similar law. It never negates what has come before it and is never negated by what follows.
Poetry lives in complete calm through the centuries.
That is why I wrote my Rubaiyaat. But, by your leave, please do not speak to me of Truth. A Novel by Amin Maalouf. There is no intellectual exercise that is not ultimately useless. In literature this ultimate decay is even more notorious.