exert so
powerful a world influence as in prayer. These principles are:

_God has accomplished most by the men who have adventured themselves
most upon God._

_Men must commune with Christ if they are to communicate Christ._

2. _Prayer Finds a Way Out in Hours of Crisis._

The history of the way in which victory has been achieved in the great
spiritual crises of the world is a record of answered prayer. There is
no more impressive picture in the Old Testament than that of Moses,
the great leader of Israel, in the midst of a desperate battle with
his hands lifted in intercession. When he wearied and his hands were
withdrawn, Israel was defeated, but so long as his hands were upheld
and there was an unceasing stream of intercession, Israel prevailed.
Crowded into that one incident is one of the greatest single spiritual
lessons which God would teach mankind. There is no other way than this
to meet the spiritual crises of the world victoriously. The great
battle of Jesus was not won at Calvary but in the garden in prayer.
The crowded record of achievement in all the home and foreign mission
fields of the Church is full of incidents of the truth of the
principle just stated. Since it is the judgment of the missionary
leaders of to-day that there never has been such an hour of crisis and
opportunity in the world, then there never was a time when there was
such need that men should covenant with God to wield the force of
intercession. The victory which is achieved at the front of the battle
will be commensurate with the volume of intercession in Christian lands.

3. _Prayer is the Only Power that can Fill the Gaps in the Thin Line
of Battle._

The second study in this little book reveals the tremendous unmet need
of the world. The line is very thin in many parts of the field, in
many sections of the world it can be said to be nothing more than a
picket-line. If qualified leaders are to be thrust out into these
fields, if the Church is to recover the lost frontiers in the great
cities and country districts of the home land and in the Mohammedan
and pagan world abroad, if every man in the world is to be given an
adequate opportunity in his lifetime to know our Christ, then the
great crucial problem is how to multiply the number of those who will
enlist as intercessors and then devote themselves to the enlistment of
others until the whole Church is committed to this task.

Is it too much to expect that every man in his