For there is one God, and one mediator between God and men, the man Christ Jesus. (1 Tim 2:5)

A, “mediator,” is a proxy; one who connects two parties. Jesus Christ is the sole Mediator between the believer and God. If Christ is in us, then by His very presence in us, we are joined to both Him and the Father.
Now, notice what this means: It means that there must NEVER be introduced anyone or anything into our relationship with God who acts as ANOTHER mediator. There are no mediators in addition to Christ – there is no one who can enhance our personal access and relationship with God. In short, our access to God is NOT dependent upon our relationship with another. We do not have to, “submit,” to another in order to maintain access to God. We do not have to belong to the right group, or the right church, or be under the supposed authority of the right leader, to be right with God. Anyone who teaches otherwise is a false teacher. This is basic Truth.
Christianity is CHRIST IN YOU. Get that: Christ IN YOU. Thus, the very definition and meaning of Christianity – the very definition of Christianity reveals that you are already personally and individually ONE with God through Christ. Your access is personal and complete – through the very presence of our one Mediator in us.