The Spirit of Christ in us is the Spirit of Truth. Our limited understanding of the scriptures is not the ultimate Truth. Every Truth we see and understand in the scriptures has to be validated and affirmed by the Spirit of Christ in us. If we do not rely on the Spirit of Christ in us to understand the scriptures then we are relying on our own human knowledge and reasoning which we have acquired from the world around us, it will never lead us to the complete Truth. Scriptures are to be studied under the guidance of the Holy Spirt, who is the author and the Spirit of Truth.