Everyone in difficulty with his faith should give due weight to this important truth. Our intellectual troubles are not all caused by the bankruptcy of our spiritual lives, but many of them are. Men live with drained and unreplenished spirits, from which communion with God and service of high causes have been crowded out. God grows unreal. The self-evidencing experiences that maintain vital confidence in the spiritual life grow dim and unimperative. Men pass years without habitually thinking as though God really were, without making any great decisions as though God's will were King, without engaging in any sacrificial work that makes the thought of God a need and a delight, without the companionship of great ideas or the sustenance of prayer. Then, when experience is denuded of any sense of God's reality, some intellectual doubt is suggested by books or friends, or fearful trouble shatters happiness. What recourse is there in such a case? The arguments of faith have no experience to get their grip upon; they can appeal to no solid and sustained fact of living. Religious confidence goes to pieces and men tell their friends that modern philosophy has been too much for faith. But the underlying difficulty was not philosophical; it was vital. The insolvency of "belief" was due to the bankruptcy of "trust." Personal fellowship with God failed first; the theory about him lapsed afterward. Throughout our endeavor to deal with intellectual perplexity, this fundamental truth should not be forgotten. _The peril of religion is that vital experience shall be resolved into a formula of explanation, and that men, grasping the formula, shall suppose themselves thereby to possess the experience._ If one inquires what air is, the answer will probably be a formula stating that oxygen and nitrogen mixed in proportions of twenty-one to seventy-nine make air. But air in experience is not a formula. Air is the elixir we breathe and live thereby. Air is the magician who takes the words that our lips frame and bears them from friend to friend in daily converse. Air is the messenger who carries music to our ears and fragrance to our nostrils; it is the whisperer among the trees in June, and in March the wild dancer who shakes the bare branches for his castanets. Air is the giant who piles the surf against the rocky shore, and the nurse who fans the faces of the sick. One cannot put that into a formula. No more can God be put into a theology, however true. They who define him best may understand him least. God is the Unseen Friend, the Spiritual Presence, who calls us in ideals, warns us in remorse, renews us with his pardon, and comforts us with power. God is the Spirit of Righteousness in human life, whose victories we see in every moral gain, and allied with whom we have solid hopes of moral victory. God is the One who holds indeed the far stars in his hand, and yet in fellowship with whom each humblest son of man may find strength to do