“Those blacks in africa have the nature to suck up all the light and wamth from space. They consume that. And that light and that warmth in space can not pass through the whole body, because man always is man, even when he is black.

It does not pass through the whole body, but stays on the surface of the skin, and then the skin itself turns black.” (Rudolf Steiner)

Source: Rudolf Steiner, Lecture on March 3rd, 1923 in Dornach. Quote by Humanistische Aktion.