If the soul is eternal, and i go to straight to heaven when i die why do i need or even want to be resurrected

when lazurus was resurrected why diddnt he thank Jesus for saving him from hellfire, or ask Jesus, why did you do this i was in heaven. If Jesus is God then how did God die. God is immortal. And if Jesus is God and diddnt die, then how was there a sacraficial death?And shed blood? If my soul is imortal and i go straight to heaven, why do i need to be resurrected. why would i ever want to come back to earth from heaven? If Jesus is God and did die, then who held the universe together and ruled it while he was dead?