The Church of his day seems to him a veritable Babel--"full of pride and wrangling, and jangling, and snarling about the letter of the written Word," lacking in true, real, effectual knowledge and power; a pitiably poor "substitute for the Temple of the holy Spirit where God's living Word is taught."[51] Through each of his books we hear of "verbal Christendom"; of "titular Christians"; of "historical feigned faith"; of "history religion"; of "an external forgiveness of sins"; of "the work of outward letters." "The builders of Babel," he says, "cannot endure that one should teach that Christ Himself must be the teacher in the human heart"--"they jangle instead about the mere husk, about the written word and letter while they miss the living Word."[52] The divisions of Christendom are due to the fact that its "master-builders" are of the Babel-type. They always follow the line of _opinion_; their basis is "the letter"; their method of approach is _external_. They build "stone houses in which they read the writings which the Apostles left behind them," while they themselves dispute and contend about "mental idols and {170} opinions."[53] The true Church of Christ, on the contrary, is the living Temple of the Spirit. It is built up of men made wholly new by the inward power of the Divine Spirit and made _one_ by an inward unity of heart and life with Christ--as "a living Twig of our Life-Tree Jesus Christ." Nobody can belong to this Church unless "he puts on the shirt of a little child," dies to selfishness and hypocrisy, rises again in a new will and obedience, and forms his life in its inmost ground according to Christ, the Life.[54] "The wise world," he declares, "will not believe in the true inward work of Christ in the heart; it will have only an external washing away of sins in Grace," but the ABC of true religion is far different.[55] He only is a Christian in fact in whom Christ dwelleth, liveth and hath His being, in whom Christ hath arisen as the eternal ground of the soul. He only is a Christian who has this high title in himself, and has entered with mind and soul into that Eternal Word which has manifested itself as the life of our humanity.[56] He wrote near the end of his life to Balthazar Tilken: "If I had no other book except the book which I myself am, I should have books enough. The entire Bible lies in me if I have Christ's Spirit in me. What do I need of more books? Shall I quarrel over what is outside me before I have learned what is within me?"[57] "What would it profit me if I were continually quoting the Bible and knew the whole book by heart but did not know the Spirit that inspired the holy men who wrote that book, nor the source from which they received their knowledge? How can I expect to understand them in truth, if I have not the same Spirit they had?"[58]