Taken from 1 Peter 2 All those who are alive in Christ are his priests.Take verses like John 3:16 & 1John 1;9,Once a person has become a christian Jesus gives us the third person in the Godhead the Holy spirit to guides us into all truth. First convicting us to things we need to put right then leading us in a path of rightousness, through pray and his word sharing that with each other.