One never learns to know people from a world view that is merely outwardly oriented. Once an viewpoint that is clouded by materialism orientates itself only on the outer appearance of a person, once the human being does not know what hides behind this physical corporality, and he thereby does not get the opportunity to look behind the scenes so to speak, he is not at all capable, really unable, to understand something about the forces that guide and direct life. That is precisely the task of spiritual knowledge. It has to be admitted that this task is not currently fulfilled in the right measure. [….] However, that is not what really matters, what is important is that which becomes possible through spiritual insight. It can be something that not only teaches us, but provides powerful schooling for our inner soul forces as well. That is what can best be brought about through spiritual knowledge, when we look at the spiritual worldview from out of the perspective of what can be developed through it.
Source (German): Rudolf Steiner – GA 054 – Die Welträtsel und die Anthroposophie – Hamburg, 2nd March 1908 (page 91-92)
Translated by Nesta Carsten-Krüger