More from Colossians:
1:13-14 For he has rescued us from the dominion of darkness and brought us into the kingdom of the Son he loves, 14 in whom we have redemption, the forgiveness of sins.
Christ brings the forgiveness of sin, not our faith.
1:19-23 For God was pleased to have all his fullness dwell in him, 20 and through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross.21 Once you were alienated from God and were enemies in your minds because of[g] your evil behavior. 22 But now he has reconciled you by Christ’s physical body through death to present you holy in his sight, without blemish and free from accusation— 23 if you continue in your faith, established and firm, and do not move from the hope held out in the gospel. This is the gospel that you heard and that has been proclaimed to every creature under heaven, and of which I, Paul, have become a servant.
His blood, His sacrifice.
2:11-15 In him you were also circumcised with a circumcision not performed by human hands. Your whole self ruled by the flesh was put off when you were circumcised by[c] Christ, 12 having been buried with him in baptism, in which you were also raised with him through your faith in the working of God, who raised him from the dead. 13 When you were dead in your sins and in the uncircumcision of your flesh, God made you[d] alive with Christ. He forgave us all our sins, 14 having canceled the charge of our legal indebtedness, which stood against us and condemned us; he has taken it away, nailing it to the cross. 15 And having disarmed the powers and authorities, he made a public spectacle of them, triumphing over them by the cross.
Again, THE CROSS!
2:23 Such regulations indeed have an appearance of wisdom, with their self-imposed worship, their false humility and their harsh treatment of the body, but they lack any value in restraining sensual indulgence.
It's all about the Cross and not about us. Suffering can never accomplish the work of salvation, only Christ can.