In context ;
Froh empfind' ich mich nun auf klassischem Bodem begeistert,
Lauter und reizender spricht Vorwelt und Mitwelt zu mir.
I was wondering if these were compound nouns; as well, 'welt' ( =world) is a part of these words. Therefore I thought Vorwelt might be referring to the past, and Mitwelt to the present. This is a complete amateur guess thoughh. If anyone could help me, it would be much appreciated :).