The third ideal may be described as follows: All changeable things are subject to the play of evolution, and are mortal, from the tiny flower in the field to the awe-inspiring cloud figure in the heavens which is called the nebula of Orion. But the laws which the stars and the planets obey in their paths through the heavens never change nor grow old; they are immutable, they are immortal. The elements of the microcosm, the electrons in the atom, are as far as we know immutable and immortal, because man knows no natural process by which the electrons and the laws which they obey can ever be changed. They are not the product of any natural process of evolution known to man. To discover the immutable laws which this substantia, this immutable foundation of the universe, obeys is the highest aim of scientific research. The existence of these eternally unchangeable things brings us face to face with a power which is the eternally immovable background of all physical phenomena. We feel intuitively that science will never penetrate the mysteries beyond it, but our faith encourages us in the belief that there behind the impenetrable veil of this eternal background is the throne of a divine power, the soul of the physical world, the activity of which we contemplate in our research of physical phenomena. I am sure that many loyal members of the National Research Council believe that scientific research will bring us closer to this divinity than any theology invented by man ever did. The cultivation of this belief is certainly one of the ideals of American science, represented by the men who are associated in the National Research Council. In the face of this ideal, there certainly cannot be any conflict between science and religion.