persons, such as Goethe and Helmholtz, we learn, indeed, that the most essential and original parts in their creations came to them in the form of inspirations and reached their perceptions almost finished. There is nothing strange about the assistance of the conscious activity in other cases where there was a concerted effort of all the psychic forces. But it is a much abused privilege of the conscious activity that it is allowed to hide from us all other activities wherever it participates.

It will hardly be worth while to take up the historical significance of dreams as a special subject. Where, for instance, a chieftain has been urged through a dream to engage in a bold undertaking the success of which has had the effect of changing history, a new problem results only so long as the dream, regarded as a strange power,