From the earliest times it has been customary to say that the true Church must be one, holy, catholic, and apostolic. That is true if the Church invisible be meant. The true body of Christ, the company of persons who in all countries and ages have called upon Christ and served Him, do form one, holy, catholic, and apostolic Church. But it is not true of the Church visible and disastrous consequences have at various times followed the attempt to ascertain by the application of these notes which actual visible Church has the best claim to be considered the true Church. Without concerning himself explicitly to describe the distinguishing features of the true Church, Paul here gives us four notes which must always be found[1]:-- [1] Comp. F. W. Robertson's _Lectures on Corinthians_. 1. Consecration. The Church is composed of "them that have been sanctified in Christ Jesus." 2. Holiness: "called to be saints." 3. Universality: "all that in every place call on the name," etc. 4. Unity: "both their Lord and ours." 1. The true Church is, first of all, composed of consecrated people. The word "sanctify" bears here a somewhat different meaning from that which we commonly attach to it. It means rather that which is set apart or destined to holy uses than that which has been made holy. It is in this meaning the word is used by our Lord when He says, "For your sakes I sanctify"--or set apart--"Myself." The Church by its very existence is a body of men and women set apart for a holy use. The New Testament word for Church, _ecclesia_, means a society "called out" from among other men. It exists not for common purposes, but to witness for God and for Christ, to maintain before the eyes and in all the common ways and works of men the ideal life realized in Christ and the presence and holiness of God. It becomes those who form the Church to meet God's purpose in calling them out of the world and to consider themselves as devoted and set apart to attain that purpose. Their destination is no longer that of the world; and a spirit set upon the attainment of the joys and advantages the world gives is wholly out of place in them. 2. More particularly those who compose the Church are called to be "saints." Holiness is the unmistakable characteristic of the true Church. The glory of God, inseparable from His essence, is His holiness, His eternally willing and doing only what is the very best. To think of God as doing wrong is blasphemy. Were God even once to do other than the best and right, the loving and just thing, He would cease to be God. It is the task of the Church to exhibit in human life and character this holiness of God's. Those whom God calls into His Church, He calls to be, above all else, holy.