How long is eternity? It is beyond our imagination. Let's just try to take a glimpse at how long eternity really is;

   "Suppose that a sparrow took a drop of water from the Atlantic Ocean, hopped across the country, put that drop in the Pacific Ocean, then hopped back to the Atlantic Ocean, and repeated the same thing. When that bird had emptied the Atlantic Ocean into the Pacific Ocean, eternity would have just begun. And how tragic to spend that eternity in hell!

   Think of all the leaves on all the trees. Multiply their number by all the grains of sand on every beach. Then multiply that total by all the inches between yourself and the sun.  
Let the sum total represent centuries, and only then would eternity have begun. Only then would the sinner in hell have a small part of the suffering of that awful place".