[Because of the sin in our lives,] the power and might of death are rooted in the fearfulness of our nature and in our untimely and undue viewing and contemplating of it. …
Look at sin only within the picture of grace. Engrave that picture in yourself with all your power and keep it before your eyes. The picture of grace is nothing else but that of Christ on the cross and of all his dear saints.
The picture of grace
How is that to be understood?
Grace and mercy are there where Christ on the cross takes your sin from you, bears it for you, and destroys it. To believe this firmly, to keep it before your eyes and not to doubt it, means to view the picture of Christ and to engrave it in yourself....
In this way you may view your sins in safety without tormenting your conscience. Here sins are never sins, for here they are overcome and swallowed up in Christ.
Grace strangles death
He takes your death upon himself and strangles it so that it may not harm you, if you believe that he does it for you and see your death in him and not in yourself. Likewise, he also takes your sins upon himself and overcomes them with his righteousness out of sheer mercy, and if you believe that, your sins will never work you harm.
In that way Christ, the picture of life and of grace over against the picture of death and sin, is our consolation. Paul states that in 1 Corinthians 15 [:57], “Thanks and praise be to God, who through Christ gives us the victory over sin and death.” …
The cross guarantees grace
So then, gaze at the heavenly picture of Christ, who descended into hell [1 Pet. 3:19] for your sake and was forsaken by God as one eternally damned when he spoke the words on the cross, “Eli, Eli, lama sabachthani!” — “My God, my God, why have you forsaken me?” [Matt. 27:46].
In that picture your hell is defeated and your uncertain election is made sure. If you concern yourself solely with that and believe that it was done for you, you will surely be preserved in this same faith.
Never, therefore, let this be erased from your vision. Seek yourself only in Christ and not in yourself and you will find yourself in him eternally.
Source: Martin Luther, Luther’s Works, Vol. 42: Devotional Writings I, ed. Jaroslav Jan Pelikan, Hilton C. Oswald and Helmut T. Lehmann, Vol. 42 (Philadelphia: Fortress Press, ©1999), 99-115.