The Multiple Aspects of the Given—Ontological Remarks on Ernst Mach’s Empiricism

Philosophers often rely on sciences of their own time. This is especially true for scientists writing philosophical works. In the case of Ernst Mach, the scientific references are mainly to physics, physiology, evolutionary biology and—in a somewhat different manner—the new discipline of psychology. Like so many authors in the late 19th century, Mach had extreme confidence in the methods of the natural sciences. However, this trait, often called scientism or positivism, can easily be used in polemical accounts that obscure other aspects of Mach’s thought. Mach is well-known for both his analysis of sensations and his evolutionary conception of perception and knowledge. The tension between the ambition to clarify the empirical basis of perception on the one hand and the focus on the natural origins of human perception on the other hand is, however, considerable. A comparison of these two perspectives can contribute to an ontological understanding of experience that sheds new light on the much-discussed topic of sense data and at the same time clarifies the difference between experience and observation and the role of experimental science in this context. In some respects, Mach seems closer to William James than to his followers in the Vienna circle. The accusation of idealism made by Lenin in his influential critique of positivism overlooks the implications of this naturalist approach but offers the occasion to dwell on the ontological implications of something that can be called natural historicity. Comparisons with Aristotle, Bacon, Descartes and Kant situate the empiricist theory of perception.