God's mercy

poor sinful man is justified before God, that is, absolved and declared free and exempt from all his sins, and from the sentence of well-deserved condemnation, and adopted into sonship and heirship of eternal life, without any merit or worth of our own, also without any preceding, present, or any subsequent works, out of pure grace, because of the sole merit, complete obedience, bitter suffering, death, and resurrection of our Lord Christ alone, whose obedience is reckoned to us for righteousness.
Solid Declaration, FC 1580