Such is the problem to-day, and no complete answer is to be found in the past systems of Metaphysics.  “The possibilities of Life and [p.244] of Knowledge are in no way exhausted, but it is only through our own courage and actions that the possibilities can become actualities” (Erkennen und Leben, p. 161).

The various systems of Thought need a synthesis which will include them all.  It is difficult to-day to obtain a theory of life which does not leave out of account some essential elements.  Is there a possibility of discovering such a synthesis?  I believe that Eucken’s works answer this question.  But we wait eagerly for the appearance of his greatest work, and I think that, when it appears, he will more than ever deserve Windelband’s designation of him as “the creator of a new Metaphysic.”

* * * * *

APPENDIX [p.245]

* * * * *

LIST OF EUCKEN’S WORKS

1866.  “De Aristotelis docendi ratione.”  Pars I. De particularis.  This was
       the Doctor’s dissertation at Goettingen University.

1868.  “Ueber den Gebrauch der Praepositionem bei Aristoteles.”

1870.  “Ueber die Methode und die Grundlagen der Aristotelischen Ethik”
       (Separatabdruck aus dem Programm des Frankfurter Gymnasiums von 1870).

1871.  “Ueber die Bedeutung der Aristotelischen Philosophie fur die Gegenwart”
       (Akademische Antrittsrede gehalten am 21 November, 1871).  This was in
       Basel.

1872.  “Die Methode der Aristotelischen Forschung in ihrem Zusammenhang mit
       den philosophischen Grundprincipien des Aristoteles.”

1874.  “Ueber den Wert der Geschichte der Philosophie” (Antrittsrede, Jena,
       1874).

1878.  “Die Grundbegriffe der Gegenwart.”  This was translated by Stuart
       Phelps in 1880, and published by Appleton of New York.  The fourth
       edition has been translated by M. Booth, and has been published by
       T. Fisher Unwin in 1912.  The title of the third German edition was
       changed to “Geistige Stromungen der [p.246] Gegenwart.” 
       The English edition is entitled “The Main Currents of Modern Thought.”

1879.  “Geschichte der philosophischen Terminologie.”

1880.  “Ueber Bilder und Gleichnisse in der Philosophie”:  Eine Festschrift.

1881.  “Zur Erinnerung an K.Ch.F.  Krausse” (Festrede, gehalten zu Eisenberg
       am 100 Geburtstage des Philosophen).

1884.  “Aristoteles Anschauung von Freundschaft und von Lebensguetern.”

1885.  “Prolegomena zu Forschungen ueber die Einheit des Geisteslebens in
       Bewusstsein und Tat der Menschheit.”

1886.  “Die Philosophie des Thomas von Aquino und die Kultur der Neuzeit.”

1886.  “Beitraege zur Geschichte der neueren Philosophie.” (Second edition,
       1906, under the title “Beitraege zur Einfuehrung in die Geschichte
       der Philosophie.”)