The ancient sundial in the magnificent enclosed courtyard at Schloss Forchenstein

eterna eternas eternatura per horas secula morales inter dum querimus umbras eternos vitam tunc mensuramus ad annos.
It was a long time ago that I studied Latin, but I think it translates as
Eternity for the common man is measured in hours, whilst those concerned with moral philosophy can argue that the darkness of eternal life is measured in years...?