In the lower kingdoms it is a survival of the _fightest_, in the highest a survival of the fittest, the struggle for life for ourselves merging into a _struggle for life for others_. Even among men in the earlier days, to discover the greatest man, the measuring-string was placed around the muscle. That was the age of Hercules. Then the time came when the measuring-string was placed around the head. That was the age of Bacon and Shakespeare. But the time comes in the rapidly advancing future when the measuring-string will be placed around the heart, and he who measures most there will be most conformed to the Master, for he is greatest who most fully gives himself for others. * * * * * Evolution goes on, hereafter, in the inner and upper world, outside and beyond our vision, making many and many variations doubtless, as in the lower realms. In the Father’s spiritual house also are many mansions. We are stepping from the physiological to the psychological, from body and mind to spirit. As in all previous growth, the latest type-life is reappearing in His generation—in the “new creatures” of His kingdom. II The outward evolution—that of the physical—marvelous beyond thought, is comparatively insignificant. The chief evolution has been and is within. The scientist is unscientific who ignores the greater evolution and builds his explanatory system on the lesser—on the least. Psychology is also a science. Has nature one method for the development of the physical part of man’s being, and another for the development of the non-material and spiritual? Nature is not divided. What means the hereditary likeness, mental and spiritual—not less marked than the physical? These marks often skip many generations and then reappear again in full. They can not, therefore, be the result of education or imitation. Nor is it easy to believe that they were placed within us by a direct act of creation, as the old-fashioned theological professor taught that God mixed the fossils with the plastic stones at creation, somewhat as a cook mixes raisins and other fruits in the dough for her plum-pudding.