Victory in Christ is the idea that through Jesus, believers have victory over sin and death, and can experience everlasting life with God. It means that believers can serve God without fear, and have absolute victory over the enemy.
This means that our victory over sin and death is in Jesus from beginning to end. No part of it is by our human efforts. We have been divorced from the law and have come into union with God. Now, Christ has redeemed us from the curse of the law and we have victory in Him.