“The Holy Christian Church is the principal work of God”
In The Lord's Service: The Grace of Covenant Renewal Worship, 2003, Jeffrey J. Meyers, Canon, Pr., , p. 285. http://books.google.com/books?id=6CSuYz4zj8wC&pg=PA285&dq=%22for+the+sake+of+which+all+things+were+made%22++luther&hl=en&ei=dcKXTeK3IZCw0QGkzJCBDA&sa=X&oi=book_result&ct=result&resnum=3&ved=0CDIQ6AEwAg#v=onepage&q=%22for%20the%20sake%20of%20which%20all%20things%20were%20made%22%20%20luther&f=false
Auslegung vieler schöner Sprüche aus göttlicher Schrift (Exposition of Many Beautiful Verses from Divine Scripture (selection) (1547)), http://books.google.com/books?id=WCToPQAACAAJ&dq=%22Auslegung+vieler+sch%C3%B6ner+Spr%C3%BCche+%22&hl=en&ei=XcOXTbrhFeyD0QGU_YSADA&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCgQ6AEwAA
Dr. Martin Luther's Sämmtliche Werke, 1853, Frankfurt-on-the-Main, Erlangen, Heyder & Zimmer, vol. 52, p. 324. http://books.google.com/books?id=WsMOAQAAMAAJ&pg=RA1-PA324&dq=%22welches+willen+alles+geschaffen+ist,+darinnen+t%C3%A4glich%22&hl=en&ei=FMqXTcuLH8K60QGtgun3Cw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCkQ6AEwAA#v=onepage&q=%22welches%20willen%20alles%20geschaffen%20ist%2C%20darinnen%20t%C3%A4glich%22&f=false
Context: The Holy Christian Church is the principal work of God, for the sake of which all things were made. In the Church, great wonders daily occur, such as the forgiveness of sins, triumph over death... the gift of righteousness and eternal life. (Commentary on Psalm 143:5)