Evidently, he was likening the world to a stage, with actors in a drama playing their roles as good or bad characters until a change of scenes.
قَالَ ٱلرَّسُولُ بُولُسُ :‏ ‏ «‏ مَشْهَدُ هٰذَا ٱلْعَالَمِ فِي تَغَيُّرٍ » .‏