Immortality, eternal life.
He lived for 500 yrs and realized everything is meaningless after experiencing it once. Wealth, women etc.
He said he lived in his old world where immortality was out of reach, so everyone settled for what they could achieve with their short lives(wealth and power), and now that he got reincarnated to this world where achieving immortality is not a fantasy, not seeking it would be stupidity.
Wether he’ll achieve it or not, he doesn’t know, but at least he won’t die with regrets if he gives it his all, cus there’s nothing else what pursuing.
