How do Postmils (and "Optimistic" Amils) reconcile the passages that say the kingdom of God grows steadily and slowly throughout the whole earth until the day when the earth will be filled with the knowledge of the Lord...and the passages about being watchful because the Lord could return at any moment like a thief in the night? From the postmil perspective, if we see there is still a lot of work to be done in the world until the nations come to Christ, how can the postmil still believe that the Lord could suddenly come as a thief in the night?