What does it mean that the last chapters of Romans are practical Christian living?
It means the last four chapters of Romans address common, ordinary Christian conduct. They present believers as a set-apart people who live to please God first, making Him the priority so other things take their rightful place. This is everyday living, not oddball or left-field, but a people of the Book.
Les explains that the last four chapters of Romans are just simply practical Christian living. By practical, he means common and ordinary. He connects this to the illustration of Temple instruments set apart for Temple use only: believers too are a set-apart people. That does not make them oddball or out in left field, but in God's mind it designates them as people of the Book, living to please Him first. This comes down to priority: God first, then other things come into their rightful place. He points to Scripture's teaching from Christ's earthly ministry, "Seek ye first the Kingdom of Heaven, and then all these other things can be added unto you."