In the _Kampf um einen geistigen Lebensinhalt_--a book of the greatest value--we find Eucken at his best. His attempt here is to deal with the struggle for the spiritual life and the certainty of its possession. He shows how man has emerged out of Nature, and how he has moved in the direction of gaining an inner world during the long course of civilisation, culture, morality, and religion. Through titanic struggles this inner world becomes man's possession, and constitutes the true value and significance of his life. Man now realises that it is this world of spirit and values [p.241] which constitutes the only really true world. Issuing out of this possession of the ever richer contents of this inward, spiritual world, the personality constantly becomes something quite other than it was, and its possession adds to the inheritance of the spiritual ideals of the world. At this source man is in possession of a power of a new kind of creativeness in any field of knowledge or life he may be obliged to work. Nothing blossoms or bears fruit without the presence and the power of spiritual life in the deepest inwardness of the soul. In _The Truth of Religion_ Eucken roams in a vast territory. All the oppositions of the ages to religion are brought on the stage, and are made to reveal their best and their worst. He shows how every system of thought, devoid of the experience and activity of the deepest soul, fails to engender religion. He shows over against all this the intellectual warrant for religion, and passes from this to the personal search by the soul for what is warranted by the intellect and by the deepest needs of one's own being. This has been the meaning of the religions of the world, and this meaning finds its culmination in Christianity. Eucken's smaller books, such as _The Life of the Spirit, Christianity and the New Idealism, Koennen wir noch Christen sein?_, and _The Meaning and Value of Life_, present certain aspects of the larger volumes in a simpler form. Eucken is at present engaged upon the [p.242] completion of a work of great importance dealing with _The Theory of Knowledge_. His system has been stated to be in need of this important corner-stone, and he has hastened to meet the demand. The book will deal with the "grounds" of the life of the spirit in an even more fundamental manner than any of his books. A preparatory work, small in bulk--_Erkennen und Leben_--has just appeared in German, and will be issued in English in the spring of 1913.