Complex sentence: Heaven is the ultimate happiness received when soul escapes the cycle of rebirths and reunites with the Creator, while hell is conceptualized as the bitterness of being unable to reunite with the Creator and escape from the cycle of rebirth.
Split into simpler sentences: Heaven is the ultimate happiness received when soul escapes the cycle of rebirths and reunites with the Creator. While hell is conceptualized the bitterness of being unable to reunite with the Creator and escape from the cycle of rebirth.