In what ways should we be different from the world?
How do we attempt to be different from the world in ways that aren't necessary?
Why is Paul so 'negative' about being a servent of God in chapter 6 (in beatings in imprisonments, in tumolts, in labors, in sleeplessness, etc)?
Should we expect this sort of thing? Are we doing something wrong if it doesn't happen? What does it mean for us?
Are there areas in which we should be careful to not 'be bound together with unbelievers'? What sorts of things should we worry about (and why)?
Paul encourages us to perfect our holiness in the "fear of God". What does it mean to have the 'fear of God'?