“In the world you will have tribulation. But take heart; I have overcome the world.” (John 16.33 – Click to see John 16.25-33 at Logos)
I usually hear this verse when people are referring to the promise of trouble. It seems, that Jesus is admitting to a background of trouble, but emphasizing the optimism of victory. And the victory isn’t future, it is past:
Yes, it’s true there will be trouble – but keep your chin up - I’ve already won the fight.
Good postmill thought