At the start of this new chapter, Paul goes right into a discussion about the importance (and imperative!) of a life lived in devotion to the Lord Jesus, which manifests itself in holiness. Paul specifically calls it a “walk”. The walk is a Jewish euphemism that we actually understand in our own culture (i.e. whenever we say something like “don’t just talk the talk, walk the walk”). To Paul, it matters whether not we are actually living out the devotion to our King that we claim we have.  Are we walking this walk? 
(1 Thessalonians 4:1-8)