It is impossible for us in this series of studies to attempt any detailed survey of the revealing movement of which our Scriptures are the outcome. It is important, however, that we should see clearly that the revelation came to those who opened themselves to the light in an obedient spirit. While it is not in accord with our modern knowledge of psychology to assort and divide human activities too sharply, it is nevertheless permissible to insist that the biblical revelation was in a sense primarily to the will. As Frederick W. Robertson used to say, obedience is the organ of spiritual knowledge. The first men to whom illuminations came evidently received these gifts out of some purity of intention and moral excellence. These early leaders gathered others around them and set them on the path of determined striving toward a definite goal. As the idea of the seer or the prophet found general acceptance it gradually hardened into law, law meant for scrupulous observance. If a singer felt stirred to write a psalm, he voiced his experiences or his aspirations in the midst of a throbbing world. If a statesman drew a wide survey of God's dealings with the nations of the earth, he did so at some mighty crisis in Israel's relations to Egypt or Assyria or Babylon. When we reach New Testament times we find that even the Gospels seem to have been books struck out of immediate practical urgencies rather than composed tranquilly with a scholar's interest merely in doing a fine piece of professional work. The early Christians were anxious to hold the believers to the strait and narrow way. To do this they repeated often the words of the Lord Jesus. When, however, the older members of the first circles began to fall away, the words were written down, not because some scholar felt moved thus to improve his leisure, but because it was absolutely necessary to preserve the words. Moreover, conflicts were arising between the growing church and the forces of the world round about. Some scriptures were written to supply instruments with which to carry on the warfare. Always the fundamental aim was to keep the people acting according to the teachings which lay at the heart of the Christian system. The object of the biblical revelation was from the beginning just what it is to-day in the hands of Christian believers--the object of using the Scriptures as an instrument for practicing the Christian spirit into all the phases of life.