A grain of sand, a million years, eternity!

I miss him... he used to tell me that our story was Once upon a time, they lived happily ever after...The End.  I didn't want it to end... I wanted it to go on forever and ever and ever.  But that is what eternity is.  One time I heard someone say that eternity is something like this:  Imagine if a bird lived in heaven and came down to earth and took one grain of sand back to heaven with it.  The bird stays in heaven with that grain of sand for one million years.  Then, goes back to earth and gets another grain of sand.  The bird takes it back to heaven and stays one million more years.  Then another and another and another grain of sand is taken for one million years over and over and over until every grain of sand is gone from the earth.  After all that time has elapsed, it still does not measure eternity, and yet, we spend so much of our days here on earth storing up our treasures that we will not need in eternity.  What if we spent our time making our lives count for eternal life.  Our minutes, our money, our resources, our love, all spent for the glory of Christ.  What then would we be like?