Evolution consists in one faculty being acquired at the expense of another, and thus as the epochs took their course, the faculty which man once possessed of understanding the spiritual world became less and less. Our clear reasoning and cognitional faculties, our present logical thinking which we regard as the most important feature of modern culture — these did not exist in those early times. They had to be developed by man in the epoch to which we now belong, at the expense of the old clairvoyant consciousness. Clairvoyant consciousness will have to be cultivated again in the future evolution of mankind, but in a different way. It has to be added to the purely physical consciousness that is bound up with the faculty of intellectual logic. A rising and a falling can be traced in the evolution of human consciousness and we see therein a deep purpose in man’s development.
Source: Rudolf Steiner – GA 60 – Zarathustra – Berlin, 19th January 1911
Translated by Walter F. Knox