Paul McCain from Cyberbrethren blog has written a piece called Know doctrine...Know Mission!!! No doctrine....No Mission!!!
Highlighting that doctrine and mission should not be separated....(or rather when they are there is a problem!!!)
It is infleunced by Walther's Our common task the saving of souls 1872
It is worth reading and reflecting on...especially how the core doctrines of justification and all the doctrines of the Lutheran Church influence our understanding and approach to mission.