"Destroying his legacy?..." Dyon frowned. The demon sage had already been through so much in his life, and the fact of the matter was that he was selfless in spite of his arrogance.
Unlike other experts who tried their luck with the Timeless Library, the demon sage was almost guaranteed to transcend without it. Which means he had no need to risk losing his kingdom and everything he built. He had done so purely for the greater good.
When you think about exactly what the Timeless Library meant, it was quite analogous with faith seeds.
Faith seeds represented the path of another's cultivation. Yes, it made the initial stages much easier, but, it came at a cost.
A person with a faith seed could tap into the experience and talent of another past expert to speed up their cultivation to unprecedented levels. But, in order to cultivate, you had to come to an understanding of your own path of cultivation, thus creating your own faith seed.