Redemption through his blood
Eph 1:7,8 In him we have redemption through his blood, the forgiveness of sins, in accordance with the riches of God’s grace that he lavished on us with all wisdom and understanding.
To be forgiven of sin is essentially what it means to be justified. More specifically, the forgiveness of sins under the New Covenant is the forgetting of sins, as it is written: "This is the covenant I will make with them after that time, says the Lord. I will put my laws in their hearts, and I will write them on their minds." Then he adds: "Their sins and lawless acts I will remember no more." Heb 10:16,17 This he does richly, for there is no purgatory to make up for deficiencies in Christ's atoning work. The believers sins are completely forgiven, past, present and future.