4. Dream Life

When people to-day wish to know something, they turn to earthly objects and processes. They observe these and from their observations they work out laws of nature. They also make experiments to bring to light the secrets of nature, and the results of their experiments are further laws. Thus they come to laws of a certain type, and this they call science. Then they turn their gaze to the vastness of the heavens; they see—let us say—the wonderful spiral nebulae, where they see individual cosmic bodies emerging, and so on. To-day we photograph such things and see much more detail than telescopic observation can give. Now how do astronomers proceed to learn what is going on in those far celestial spaces? They turn to the laws of nature, laws founded on earthly conditions and earthly experiments, and then start speculating as to how, in conformity with those laws, a spiral nebula could have taken form in distant space. They form hypotheses and theories about the arising and passing away of worlds by treating facts discovered in their laboratories about manganese, oxygen, hydrogen, as laws that still hold good in heavenly spheres. When by such means a new substance is discovered, unconscious indications are sometimes given that science here is not on firm ground. Hydrogen has been found everywhere in the vastness of space, and helium, for example; and another substance that has been given a curious name, curious because it points to the confused thinking that comes in. It has been called nebulium. Thinking itself becomes nebulous here, for we find nebulium in company with helium and hydrogen. When people are so simple that they apply as laws of nature knowledge acquired in earthly laboratories, and indulge in speculation about what goes on outside in the wide realms of space, after the manner of the Swedish thinker Arrhenius [Svante August Arrhenius, a pioneer of modern physical chemistry; gained Nobel prize for his work on electrical conduction in dilute solutions. In one of his books, Das Werden der Welten, 1907 (English translation, Worlds in the Making, 1908), he suggested the name “nebulium” for a hypothetical gas represented by certain then unidentified lines in the spectra of gaseous nebulae. In 1927 it was shown that the lines are due to singly and doubly ionised atoms of oxygen.]—who has done untold harm in this connection—they are bound to fall from one error into another, if they are unable to consider without prejudice the following.