Where do we find the authentic faith of the Christian Church? In today's society we see within the Christian world numerous denominations, each claiming the fullness of the faith. Each denomination argues that it is guided by the Holy Spirit and each argues that it has the correct interpretation of the Scriptures. While it is true that God is active in all these denominations, the diversity of belief within Christianity must be viewed as troublesome since it is contrary to the unity that Christ so desired. True Christianity argues that the Catholic Church contains the fullness of the Christian faith and therefore is a must read for all Christians.