Passive obedience
This is the name given by theologians for Christ’s obedience in yielding up His life in death as a satisfaction for sin. On the basis of this obedience, the penalties of the Law incurred by the individual are paid by Christ. By it the believer is forgiven and pardoned.
Philippians 2:8—He humbled himself by becoming obedient to the point of death.
Active obedience
Pardon and forgiveness alone would not qualify anyone to go to heaven. Mere release from punishment is insufficient. One who has been released from the penalty of the Law is not on the same plane as the one who has perfectly kept the Law. Righteousness is required to enter heaven and stand before God. Non-imputation of sin is insufficient; the imputation of merit is also necessary. On the basis of Christ’s perfect obedience to his Father’s will during his lifetime, the merit of Christ’s obedience is credited to the believer so that he is accepted as righteous and restored to favor with God.
Romans 5:19—Through the obedience of the One the many will be made righteous.
Stand Firm! 