The above seems to be a Rabbinical satire on the Talmud itself
although the orthodox Jews believe that every word in it is
historically true. Well, perhaps it is so; and we outsiders are
ignorant, and without the means of judging.
Now we know what God does during the day, but how does He occupy Himself
in the night-time? We may say He does the same as at day-time; or that
during the night He rides on a swift cherub over eighteen thousand
worlds; as it is said (Ps. lxviii. 17), "The chariots of God are twenty
thousand," less two thousand Shinan; read not Shinan but She-einan,
i.e., two thousand less than twenty thousand, therefore eighteen
THE TALMUD, _Avodah Zarah_, fol. 3. col. 2.