The statement of an ecclesiastical system of doctrine may not be the absolutely true one, nor the final one. Doctrine changes, even as scientific theories change with fuller information. Doctrine also expands, with the growth of the human spirit and understanding. To-day, in one's library, one has a thousand books. They are shelved and catalogued, for reference, in a special order. But years hence, one's grandson, who inherits these books, may have ten thousand books. The aspect of the library is changed. It is filled with new volumes, and new thought. Shall we give a liberty to a man's library which we refuse to his belief? Must he--and his church--have only his grandfather's ideas, standards, and decrees? The tenets of a sect are the theological arrangement of belief which for the present seems best; it is the systematic arrangement of facts so far examined, determined, and classified. But no system of theology can be final. Thought is moving on. Experience is progressive. Providence is continually revealing. The race is a creed-builder, as well as a builder of pyramids, cathedrals, and triumphal arches. The building-up of doctrine is superb. Into doctrine are woven the intellectual beliefs, the emotional experiences, and the spiritual struggles of mankind. Doctrine is an attempt to classify the spiritual problems of the race and to present a theory of redemption which shall be adequate, spiritually progressive, and the exact expression, so far as yet revealed, of the will of God for man. All Christian doctrine is centred about one point: the redemption of the race from sin. Dealing with such great and fundamental themes, each system of doctrine is an intellectual triumph. Doctrine is an intellectual necessity. Christ is not sporadic, either in history or philosophy. To teach Christ, as the unlettered savage may who has just learned of Christ the Saviour and turns to teach his fellow-savages, might do good or save a soul from death. But in order to command the intellectual respect of the race, there must be another form of teaching yet than this, a teaching which presents Christ in the historic and philosophic setting: the central Figure in a great body of associated spiritual truth; Christ as the fulfilment of prophecy, the means of social adjustment and regeneration; the Finisher of our Faith, and the Source of eternal joy. We must be, not less spiritual Christians, but increasingly intellectual ones, as time rolls on. Who are the men who have built up doctrine? Men speak as if doctrine were an ecclesiastical toy--to be shaken by priest or prelate, as one shakes a rattle, for noise, for play! A doctrine is not a toy; it is the crystallized belief of earnest, thoughtful, and godly men--belief which has passed into a church tradition, and is now received as an act of faith.