How do we know that Christ's gospel gives life?

Christ's gospel is affirmed to give life because it is the 'law of the Spirit of life in Christ Jesus,' which declares that there is no spiritual life apart from Him. As stated, while 'the letter kills,' the Spirit-filled message of the gospel provides vibrant spiritual life and quickening power to those who believe. This gospel speaks of God's mercy and extends life to the spiritually dead through faith in Christ, making it a source of true sanctification and empowerment for obedience.