The final two lines are a rendering of Schiller's Die Freundschaft.

But the other side of its Becoming, History, is a conscious, self-meditating process - Spirit emptied out into Time; but this externalization, this kenosis, is…

Das Wahre ist das Ganze.

For the subject matter is not exhausted by any aim, but only by the way in which things are worked out in detail; nor is the result the actual whole, but only …