[Originally written for a Festschrift planned to mark the 70th birthday of Gustav Senn, professor of botany at the University of Basel. Owing to the untimely death of Professor Senn, the Festschrift did not appear, and Jung’s essay, entitled “Der philosophische Baum,” was published in the Verhandlungen der Naturforschenden Gesellschaft Basel, LVI (1945): 2, 411-23. A revised and expanded version appeared in Von den Wurzeln des Bewusstseins: Studien über den Archetypus (Psychologische Abhandlungen, Vol. IX; Zurich, 1954), from which the present translation is made.—EDITORS.]
All theory, my friend, is grey,
But green life’s golden tree.
Faust I