It depends on the individual.

For some bright light followed by an enlightenment of your senses beautiful sights, sounds, smells, feelings, like
no mortal has ever felt.

You'll understand everything have no more questions,
troubles, or wanting.

Pure contentment for all eternity.

For the rest of us a bright light then a chill of silence,
and only knowing the bad. Any good thoughts or memories
washed away, nothing for you to escape to in the coming
enlightenment of your senses. Everything you see, hear, smell, or feel has to do with punishment and pain.
Every fear magnified, every pain, an agony impossible
amongst the living

And it will only be over at the end of everything.