Nevertheless, though it is true that our modern ideas of progress on this earth never in themselves can supply an adequate philosophy of life, and though it is true that they do not dispense with, but rather emphasize, our need of God and immortality and the saving powers which Christians find in Christ, yet those ideas have in them a permanent contribution to the life of man from whose influence the race cannot escape. When we have granted the limitations which disillusioned thoughtfulness suggests concerning progress upon this earth, it still remains true that, in our new scientific control over the latent resources of the earth without and over our own mental and moral processes within, we have a machinery for producing change that opens up exciting prospects before humanity. Never in our outlook upon man's earthly future can we go back to the endless cosmic cycles of the Greeks or the apocalyptic expectations of the Hebrews. We are committed to the hope of making progress, and the central problem which Christianity faces in adjusting her thought and practice to the modern age is the problem of coming to intelligent terms with this dominant idea. These lectures are an excursion to spy out this land and to see, if we may, what the idea of progress through the scientific control of life is likely to mean and ought to mean to Christianity. If this modern idea is not intelligently guided in its effect upon our faith and practice, it will none the less have its effect in haphazard, accidental, unguided, and probably ruinous ways. If one listens, for example, to the preaching of liberal ministers, one sees that every accent of their teaching has been affected by this prevalent and permeating thought. The God they preach no longer sits afar like Dante's deity in the stationary empyrean beyond all reach of change; their God is here in the midst of the human struggle, "their Captain in the well-fought fight." H. G. Wells may be a poor theologian but he is one of our best interpreters of popular thought and his idea of God, marching through the world "like fifes and drums," calling the people to a progressive crusade for righteousness, is one which modern folk find it most easy to accept. He is a God of progress who undergirds our endeavours for justice in the earth with his power; who fights in and for and with us against the hosts of evil; whose presence is a guarantee of ultimate victory; and whose effect upon us is to send us out to war against ancient human curses, assured that what ought to be done can be done.