Just as the thief who was crucified along side Jesus, believed and asked for forgiveness ... he was justified in an instant ...
"And Jesus said to him, Truly I say to you, To day shall you be with me in paradise" (Luke 23:43).
But sanctification comes after ... harder ... through the work of the Holy Spirit ... We are molded like clay ... We are like broken vessels ... We are gold refined by fire ... and made perfect in Christ.
One of our biggest struggles can be when the enemy accuses us of being unworthy. But our worth ... our justification, is solely through our faith in Christ.
For by one offering he has perfected for ever them that are sanctified.
For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:
Till we all come in the unity of the faith, and of the knowledge of the Son of God, to a perfect man, to the measure of the stature of the fullness of Christ