[…] In order to understand the nature of development in the sixth epoch of culture, it is well to consider what will be the characteristic qualities of the soul in future incarnations. To-day, in our intellectual age, intellectuality and morality are practically separate spheres in the life of soul. It is quite possible nowadays for a man to be very clever and at the same time immoral, or vice versa — to be deeply moral and anything but clever. […] Let us think once again of the phases of evolution through the fifth, sixth and seventh post-Atlantean culture-epochs in order to grasp how intellectuality, aestheticism and morality will come to expression in men’s life of soul.
Whereas in the present fifth epoch, intellectuality can remain unimpaired even if no pleasure is taken in moral actions, in the sixth epoch, it will be quite different. In the sixth epoch, that is, from about the third millennium onwards, immorality will have a paralysing effect upon intellectuality. The mental powers of a man who is intellectual and at the same time immoral will definitely deteriorate and this condition will become more and more pronounced in the future evolution of humanity. A man who has no morals will therefore have no intellectual power for this will depend entirely upon moral actions; and in the seventh epoch, cleverness without morality will be non-existent.
Source: Rudolf Steiner: GA 130 – BUDDHA AND CHRIST: The Sphere of the Bodhisattvas – Milan – 21st September, 1911
Translated by Dorothy S. Osmond