The reason given for the acceptance or rejection of a book was its _apostolic authorship_. Only books that could claim to have been written by an apostle or an apostolic man were considered authoritative. We now know that not all the books could meet this requirement; but the Church's real reason was its own discriminating spiritual experience which approved some books and refused others. Canon Sanday sums up the selective process by saying: "In the fixing of the Canon, as in the fixing of doctrine, the decisive influence proceeded from the bishops and theologians of the period 325-450. But behind them was the practice of the greater churches; and behind that again was not only the lead of a few distinguished individuals, but the instinctive judgment of the main body of the faithful. It was really this instinct that told in the end more than any process of quasi-scientific criticism. And it was well that it should be so, because the methods of criticism are apt to be, and certainly would have been when the Canon was formed, both faulty and inadequate, whereas instinct brings into play the religious sense as a whole. Even this is not infallible; and it cannot be claimed that the Canon of the Christian Sacred Books is infallible. But experience has shown that the mistakes, so far as there have been mistakes, are unimportant; and in practice even these are rectified by the natural gravitation of the mind of man to that which it finds most nourishing and most elevating." In their attitude towards the Canon all Christians agree that the books deemed authoritative must record the historic revelation which culminated in Jesus and the founding of the Christian Church. A Roman Catholic may derive more religious stimulus from the _Spiritual Exercises_ of Ignatius Loyola than from the _Book of Lamentations_, and a Protestant from Bunyan's _Pilgrim's Progress_ than from the _Second Epistle of John_; but neither would think of inserting these books in the Canon. He who finds as much religious inspiration in some modern poet or essayist as in a book of the Bible, may be correctly reporting his own experience; but he is confusing the purpose of the Bible if he suggests the substitution of these later prophets for those of ancient Israel. The Bible is the spiritually selected record of a particular Self-disclosure of God in a national history which reached its religious goal in Jesus Christ.