It certainly is true that a door opens into a larger life and a new dimension when the soul flings itself out in real prayer, and incomes of power are experienced which heighten all capacities and which enable the recipient to withstand temptation, endure trial, and conquer obstacles. But prayer has always meant vastly more than that to the saints of past ages. It was assuredly to them a homing instinct and it was the occasion of refreshed and quickened life, but, more than that, it meant to them a time of intimate personal intercourse and fellowship with a divine Companion. It was two-sided, and not a solitary and one-sided heightening of energy and of functions. Nor was that all. To the great host of spiritual and triumphant souls who are behind us prayer was an _effective and operative power_. It accomplished results and wrought effects beyond the range of the inner life of the person who was praying. It was a way of setting vast spiritual currents into circulation which worked mightily through the world and upon the lives of men. It was believed to be an operation of grace by which the fervent human will could influence the course of divine action in the secret channels of the universe. Is this two-sided and objective view of prayer, as real intercourse and as effective power, still tenable? Can men who accept the conclusions of science still pray in living faith and with real expectation of results? I see no ground against an affirmative answer. Science has furnished no evidence which compels us to give up believing in the reality of a personal conscious self which has a certain area of power over its own acts and its own destiny, and which is capable of intercourse, fellowship, friendship, and love with other personal selves. Science has discovered no method of describing this spiritual reality, which we call a self, nor can it explain what its ultimate nature is, or how it creatively acts and reacts in love and fellowship toward other beings like itself. This lies beyond the sphere and purview of science. Science, again, has furnished no evidence whatever against the reality of a great spiritual universe, at the heart and center of which is a living, loving Person who is capable of intercourse and fellowship and friendship and love with finite spirits like us. That is also a field into which science has no _entrée_; it is a matter which none of her conclusions touch. Her business is to tell how natural phenomena act and what their unvarying laws are. She has nothing to say and can have nothing to say about the reality of a divine Person in a sphere within or above or beyond the phenomenal realm, _i.e._ the realm where things appear in the describable terms of space and time and causality.