Status Updates From Why Did Jesus Live a Perfec...

Justification apart from our works does not negate the necessity of the believer's good works in sanctification. Salvation requires both. . . . Justification and sanctification are both necessary for final salvation.

Thus, in justification our righteousness is entirely that of another—it is perfect; in sanctification we grow more and more into the image of Christ, though always imperfectly in this age. Justification is accomplished by God apart from any work of the sinner, whereas growth in sanctification requires the activity of the believer.