Some people die, and they truly die.
Take Lotson's "Soul Seizing" of Monk Liao Xin, for instance; when he turned to ashes, he really turned to ashes.
In this world, he left no trace behind, only some influence.
Some people die, yet they live on.
For example, Link, who simply, through the hands of Monk Nengqing and the wish-power of the Buddhist Sect, terminated the vitality of Monk Liao Fan's body and severed his true self's connection with Monk Liao Fan's body.
He didn't actually die and leave this world.
To put it in layman's terms, Link had separated his Wizard "mind" from the Bodhisattva "might" of Buddhism.
He would rather maintain his possibly not yet breakthrough to a level six sage Wizard "mind" than eagerly expand to the Bodhisattva "might" that approached the Buddha system of Buddhism's Ninth Level Great Sage.
Because one is the heart, and the other is external power.