The mystery of The Christ is one of the most important revelations given to the Church, mainly because it involves not only how to be saved, but also how we are to live out our salvation.
In Ephesians 3:3 and 4, Paul writes about this mystery that was given to him by a revelation from God. As the steward of the dispensation of grace, God gave Paul instructions concerning how the household of grace is to live, Ephesians 3:2. These instructions are given in the revelation of this mystery. Paul writes concerning the mystery of the Christ so that we can understand what his insight is.
Since Paul is the steward of the dispensation of grace, the mystery of The Christ is a part of this period in time. It is something that was not revealed to any other generation. In Scripture, seven dispensations are revealed (Innocence, Conscience, Government, Promise, Law, Grace, Fullness of Times). In each of these dispensations, mankind is given instruction by God through a steward. The Church exists in the dispensation of grace and is therefore subject to the standards God gave concerning the Mystery of The Christ
Since we now have insight into what is the Mystery of The Christ it is no longer a mystery to those to whom it has been revealed. A mystery in Scripture is something that was hidden, but now God has made it known, Ephesians 3:5 (which was not made known in other generations to the sons of men, just as now it has been revealed through His holy apostles and prophets by the Spirit).
The Mystery of the Christ has to do with the fact that anyone who believes the gospel for salvation is taken […]