These _a priori_ deductions as to the being of Christ were verified by a reference to fact. The life-story of the historic Christ comprises two distinct groups of experience. There are thoughts, deeds, and words attributed to Him that only God could have thought, done, and said. There are as well thoughts, deeds and words of His that only a man could have thought, done and said. Hence the diphysite doctrine was verified _a posteriori_. Again, in both groups of experience there is a never-failing connecting link. There is a unity lying deeper in His consciousness than the duality. Christ, the Agent, is the same in both parts. Whether as God or man, He is never out of character. Hence the unity of the person also was established _a posteriori_. Thus, to the orthodox Christologians, the expectation that the human Ideal would be a unity, comprising divinity and humanity, was justified by historical fact. They found a further verification on applying the test of practice. Orthodox Christology satisfies the requirements of the soul. Man's chief spiritual need is access to God through "a daysman that might lay his hand upon both." An exemplar, even though perfect, is not adequate to his need. The _unio mystica_ can only be experienced by the leisured few. Man demands a religion of redemption, a redemption that allows value to labour, to endeavour, to human thought, that recognises the reality of pain and sorrow and sin, a redemption that redeems humanity in all its phases and in the wealth of its experiences. An Agent that has not shared to the full those experiences is useless for the purpose. Redemption must be the work of One who knows God and knows man, of One who has the touch of sympathy; for to such a touch alone can humanity respond. The Christology that makes Christ Jesus consubstantial with God and with man satisfies man's deep-felt need. SUMMARY OF THE CHAPTER