The goal of demons is beyond just possession, but to create in general a backlash against all spirituality. When priests or beloved childhood figures like Michael Jackson, Cosby, etc. are revealed to be sex offenders, our sense of trust in our fellow man dwindles. The devil takes steps to rob us of the ability to enjoy God's grace. Overpopulation makes even the beauty of childbirth seem selfish. The animals we love to eat are given soulful sad eyes all the better to haunt us with--all various components of the devil's plan to shrink our soul from wispy stratus clouds into contracted dense purpose cumulonimbus so when it rains (i.e. you die) the soul falls, and the water is collected for Hell's steam engines that run the THEY LIVE mind control force field. The agony of collected souls, each trapped in its own isolated battery cell, slowly burned into nonexistence to fuel the steam engine that keeps them in dominion over us.
Thus, these daily horrors the devil inflicts are his and his minions' version of a rain dance.
Human sacrifice involves the idea of throwing another soul under the bus to escape being ground up oneself in the steam engine, being able to hold onto one's evil self, the liquid condensation of the evil ego making all sorts of harmful deals rather than surrendering.
But there is in the end one soul, so every victory of the demons is another square mile of our precious rainforest lost. That's why we, when our souls are rising and almost up and out of the wheel of woe, so often turn around and go back to help others along. I've done it three times already! And once I'm back down, buried under the mystery misery I always kind of regret that decision, or rather the ego, which returns, inevitably, convinces 'me' to regret it. The 'Me' who regrets isn't the me who made the choice to stay, it's the difference between a terrified kid on his first day of school and a graduate with a million friends, the difference between a selfish thug and the benevolent social worker trying to reach him. You can't get to heaven without becoming a selfless being of pure love. The trouble is that once you're that selfless, you hesitate to go to heaven when so many of your denser soul fellows are still suffering. The rich man can't enter the kingdom of heaven anymore than a camel can go through the needle, etc. Once unburdened by wealth, the needle threader pauses and looks back to make sure he's not needed. Is this wisdom, compassion, or another devil sucker play?