Lecture One

What has knowledge of the world become in the course of the last centuries? In its relation to the Universe, it has become a mere mathematical-mechanical calculation, to which in recent times have been added the results of spectra analysis; these again are purely physical, and even in the physical domain, mechanical-mathematical. Astronomy observes the courses of the stars and calculates; but it notices only those forces which show the Universe, in so far as the Earth is enclosed in it, as a great machine, a great mechanism. It is true to say that this mechanical-mathematical method of observation has come to be regarded simply and solely as the only one that can actually lead to knowledge.