Rabbi Menachem Mendel of Lubavitch (known as the Tzemach Tzeddek), told the story of a wagon driver who performed a great mitzvah and saved the life of a Jew.
When this man died, the heavenly court did not know how to reward him.
He had performed a great mitzvah, but being a boor and a very coarse man, he would not be able to appreciate the spiritual pleasures of Gan Eden, as tzaddikim do.
So they decided to ask him what he would like.
He asked for a new wagon with six mighty horses.
To this day, he drives this wagon with its six horses along a straight smooth road to infinity.
—Rabbi Adin Steinsaltz