We become saved members of the body of Christ when we believe that Jesus Christ, God manifest in the flesh, was delivered for our offences and was raised again for our justification. We have full assurance and complete confidence in our soul's salvation and our position before the Almighty when we understand what God has told us about these things in His written word.
Our faith is to stand in the power of God, the preaching of the cross. It is this faith that we are to walk by. Not by the works of the law nor the rudiments of the world, but by faith in the understanding of who we are in Him. The doctrine of the revelation of the mystery of Christ is able to stablish us so that we may walk worthy of our high calling in Christ Jesus.