Naturalismus, Idealismus, Expressionismus

This work invites listeners into a careful meditation on three pivotal currents of early‑twentieth‑century thought—naturalism, idealism and expressionism—by grounding the discussion in a clear account of how observation and theory intertwine. Drawing on Ernst Mach’s principle that knowledge must adapt to facts, the author sets out a method for describing both external phenomena and internal mental responses without invoking metaphysical speculation.

The narrative then moves to the modern relativist perspective championed by Moritz Schlick, showing how competing cosmological models such as the Ptolemaic and Copernican systems can each be deemed “right” when they fit the data without internal contradictions. Emphasizing the “economy of thought,” the book argues for the simplest, most coherent conceptual frameworks and encourages listeners to reconsider how philosophical positions are constructed and evaluated.