Hebrews 9:14

Hebrews 9:14 How much more will the blood of Christ, who through the eternal Spirit offered Himself without blemish to God, purify our conscience from dead works to serve the living God?

Whenever we have a feling that we are sinful or wrong, our conscience is dirty and needs the blood to purify it. Christ shed His blood on the cross to meet all the requirements of God's righteousness, holiness, and glory. Then this blood was brought into heaven itself to be sprinkled before the face of God for our forgiveness and redemption. Our conscience within us corresponds to God in heaven. When God in heaven condemns, the conoscience within us also condemns, and when God in heaven releases, our conscience also releases. Therefore, when the blood was sprinkled in the presence of God, our conscience was also sprinkled and released. For this reason, we have a good conscience, and we have peace in our conscience.

- "The Exercise of Our Spirit" P33