The cosmology of ancient Greece, saturated with astrology and Gnostic dualism, filtered into the doctrines of the early church, creating corrupt doctrines.
Faith is difficult enough to maintain on its own, but greatly confused when the pastor dilutes correct doctrine with 'benign' false doctrine from the world.
When Satan confronted Adam and Eve, he fed them three heresies that Gnosticism incorporated into its parasitic philosophy and way of life.
We have a natural desire for eternal life, but living endlessly would not be a blessing if our circumstances were miserable. Eternal life means quality of life.