If a fast flying eagle were to take one grain of sand from our planet earth and swiftly fly one million miles to a far off planet. Then when the bird gets there you deposits that one grain of sand onto the planet.
Then he flies swiftly one millions miles back to earth, picks up one grain of sand again, and swiftly flies back to that far off planet, and drops that grain of sand.
She continues doing that, going back and forth between earth and that huge planet named Arcturus, picking up one grain of sand flying to Arcturus and dropping it.
If that bird would keep on doing that until it has taken every single grain of sand off planet earth…eternity would only have just begun in heaven.