Lecture I

It was this that du Bois-Reymond felt very clearly but was able to express only much less clearly—only as a kind of vague feeling about scientific research on the whole—when in August 1872 he spoke his ignorabimus. What this ignorabimus wants to say in essence is that on the one hand, we have in the historical evolution of humanity arrived at clarity regarding nature and have constructed the concept of matter. In this view of nature we have lost man—that is, ourselves. On the other hand we look down into consciousness. To this realm we want to apply that which has been most important in arriving at the contemporary explanation of nature. Consciousness rejects this lucidity. This mathematical clarity is entirely out of place. To be sure, we find man in a sense, but our consciousness is not yet strong enough, not yet intensive enough to comprehend man fully.