Each soul is a tiny spark of consciousness. Each soul lives forever after the moment of its beginning.
At the moment of conception, a spirit, mind and body coalesce around each soul.
At the appointed time, each soul leaves the mind and body that has coalesced around it. All souls go to Judgment. Some souls receive enough mercy to pass Judgment. Those souls spend eternity in the joy of being in the presence of God, in Whose Image they are made.
What happens to lost souls? Lost souls go to eternal punishment. What happens to them? First, the lost soul suffers the agony of being painfully chewed by satan’s crushing molars.
Then, the lost soul is swallowed. It passes to satan’s stomach. There, it is agonizingly burned by the devil’s acidic digestive juices. Then, the soul is regurgitated.
Again, it is chewed and swallowed. The process repeats, forever.
When our fingers are hurt or crushed, or when we suffer a burn, we get a dim glimmer of what the poor, lost souls suffer eternally. Such injuries help us understand what happens to lost souls.
The safest way to avoid endless agony is to receive the Sacraments provided by The Only Church Jesus Founded. Only a damned fool would intentionally choose to ignore them.