"You will bear me witness, my friends, that it is exceedingly seldom I ever intrude into the mysteries of the future with regard either to the second advent, the millennial reign, or the first and second resurrection. As often as we come about it in our expositions, we do not turn aside from the point, but if guilty at all on this point, it is rather in being too silent than saying too much."
Src: Spurgeon, "The First Resurrection," 7:345.
In general, as my rep indicated, I tend to shut my mouth when God shuts His.