III. Thinking as the Instrument of Knowledge

This transparent clearness concerning our thinking-processes is quite independent of our knowledge of the physiological basis of thinking. I am speaking here of thinking as it appears to our observation of our own spiritual activity. For this purpose it is quite irrelevant how one material process in my brain causes or influences another, whilst I am carrying on a process of thinking. What I observe in thinking is not what process in my brain connects the concept of thunder with that of lightning, but what impels me to bring these two concepts into a definite relation. Observation shows that, in linking thought with thought, I am guided by nothing but their content, not by the material processes in the brain. This remark would be quite superfluous in a less materialistic age than ours. To-day, however, when there are people who believe that, when we know what matter is, we shall know also how it thinks, it is necessary to affirm the possibility of speaking of thinking without trespassing on the domain of brain physiology. Many people to-day find it difficult to grasp the concept of thinking in its purity. Anyone who challenges the description of thinking which I have given here, by quoting Cabanis' statement that “the brain secretes thoughts as the liver does gall or the spittle-glands spittle, etc.,” does not indeed know of what I am talking. He attempts to discover thinking by the same method of mere observation which we apply to the other objects that make up the world. But he cannot find it in this way, because, as I have shown, it eludes just this ordinary observation. Whoever cannot transcend Materialism lacks the ability to lead himself to the exceptional state I have described, in which he becomes conscious of what in all other spiritual activity remains unconscious. It is useless to discuss thinking with one who is not willing to adopt this attitude, just as it would be to discuss colour with a blind man. Let him not imagine, however, that we regard physiological processes as thinking. He fails to explain thinking because he does not see it at all.