"Through faith you are so closely united with Christ . . . that you can say with confidence: . . . Christ's righteousness, victory, life, etc., are mind; and Christ, in turn, says: I am this sinner, that is, his sins, death, etc., are Mine because he clings to Me and I to him; for through faith we have been joined together into one flesh and bone" (quoted in Demarest, The Cross and Salvation, 336).
reminder from Luther on our "union with Christ"
This is excellent.