For an explanation of this series click here.

This quote is included in the new "Lutheran Study Bible," the ESV version published by the Missouri Synod, not to be confused with the recently released publication from the ELCA.

It is a Luther quote with the citation WA 48:155, and I apologize that my scholarly endeavors have not equipped me to find the source and put it in common terms.

Whoever believes and holds to Christ's Word, heaven stands open to him, hell is shut, the devil is imprisoned, sins are forgiven, and he is a child of eternal life. That is what this book teaches you- the Holy Scripture- and no other book on earth.