When we study "the last things" (the technical term is "Eschatology" which means, literally "study or knowledge of the end things"), we have to make some distinctions in order to make this vast field of study manageable. We all will experience "the last things" within a matter of some years, at most. When our life here comes to an end, we will face the Judge and enter heaven or hell, depending on whether this Judge has, earlier, become our Saviour and Redeemer.