" Secular history, far from controlling sacred history, is controlled by it, must directly or indirectly subserve its ends, and can only be fully understood in the central light of Christian truth and the plan of salvation. The Father, who directs the history of the world, "draws to the Son," who rules the history of the church, and the Son leads back to the Father, that "God may be all in all." "All things," says St. Paul, "were created through Christ and unto Christ: and He is before all things, and in Him all things hold together. And He is the head of the body, the Church: who is the beginning, the firstborn from the dead, that in all things He may have the pre-eminence." Col. 1:16–18. "The Gospel," says John von Müller, summing up the final result of his lifelong studies in history, "is the fulfilment of all hopes, the perfection of all philosophy, the interpreter of all revolutions, the key of all seeming contradictions of the physical and moral worlds; it is life—it is immortality." The history of the church is the rise and progress of the kingdom of heaven upon earth, for the glory of God and the salvation of the world. "
― Philip Schaff , History Of The Christian Church (The Complete Eight Volumes In One)