From the introduction:

In this hour of all-but-universal darkness one cheering gleam appears: within the fold of conservative Christianity there are to be found increasing numbers of persons whose religious lives are marked by a growing hunger after God Himself. They are eager for spiritual realities and will not be put off with words, nor will they be content with correct "interpretations" of truth. They are athirst for God, and they will not be satisfied till they have drunk deep at the Fountain of Living Water.

This is the only real harbinger of revival which I have been able to detect anywhere on the religious horizon. It may be the cloud the size of a man's hand for which a few saints here and there have been looking. It can result in a resurrection of life for many souls and a recapture of that radiant wonder which should accompany faith in Christ, that wonder which has all but fled the Church of God in our day.

But this hunger must be recognized by our religious leaders. Current evangelicalism has (to change the figure) laid the altar and divided the sacrifice into parts, but now seems satisfied to count the stones and rearrange the pieces with never a care that there is not a sign of fire upon the top of lofty Carmel. But God be thanked that there are a few who care. They are those who, while they love the altar and delight in the sacrifice, are yet unable to reconcile themselves to the continued absence of fire. They desire God above all. They are athirst to taste for themselves the "piercing sweetness" of the love of Christ about Whom all the holy prophets did write and the psalmists did sing.