We should ask that through the same Spirit and His grace, by means of the daily exercise of reading and doing God's Word, He would preserve in us faith and His heavenly gifts, strengthen us from day to day, and keep us to the end. For unless God Himself is our schoolmaster, we can study and learn nothing that is acceptable to Him and helpful to ourselves and others.
Book of Concord
Formula, Solid Declaration
Art. II - Free Will
found in "Concordia" from CPH - page 553, para 16
