If now you are asked, What do you believe in the Second Article of Jesus Christ? answer briefly: I believe that Jesus Christ, true Son of God, has become my Lord. But what is it to become Lord? It is this, that He has redeemed me from sin, from the devil, from death, and all evil. For before I had no Lord nor King, but was captive under the power of the devil, condemned to death, enmeshed in sin and blindness.
For when we had been created by God the Father, and had received from Him all manner of good, the devil came and led us into disobedience, sin, death, and all evil, so that we fell under His wrath and displeasure and were doomed to eternal damnation, as we had merited and deserved. There was no counsel, help, or comfort until this only and eternal Son of God in His unfathomable goodness had compassion upon our misery and wretchedness, and came from heaven to help us. Those tyrants and jailers, then, are all expelled now, and in their place has come Jesus Christ, Lord of life, righteousness, every blessing, and salvation, and has delivered us poor lost men from the jaws of hell, has won us, made us free, and brought us again into the favor and grace of the Father, and has taken us as His own property under His shelter and protection, that He may govern us by His righteousness, wisdom, power, life, and blessedness.
Martin Luther, Large Catechism, II.27
Locus Communis 