The Christian religion teaches that, at death, one goes to either the most blissful place that one can imagine OR to the very worst place of never-ending pain and torment. Science tells us that only the mass and energy of the cosmos exist forever. Try 999 decillion years. Multiply that by another 999 decillion years. There would be no cold without its opposite, heat.
Happiness is a relative state and exists only with it's opposite.
It is to the credit of some religions, like Hinduism, that teach that the individual soul does not exist forever as a separate entity, but is eventually united with what they call the Ultimate reality. Apparently God was satisfied seeing his enemies lie as carrion on the fields. Many Christians understend that Jesus often spoke in parables. Not everything he said should be taken literally. He spoke of worms that never die.