A true philosopher should be a practical human being

One must be able to live in these higher worlds, but at the same time be able to bring oneself back again, so as to stand firmly on one’s own two feet. That is why in speaking of these things I state emphatically that for me as for a good philosopher a knowledge of how shoes and coats are sewn is almost more important than logic. A true philosopher should be a practical human being. One must not be thinking about life if one does not stand within it as a really practical human being. And in the case of one who is seeking super-sensible knowledge this is still more necessary. Knowers of the super-sensible cannot be dreamers or fanatics — people who do not stand firmly on their own two feet. Otherwise one loses oneself because one must really come out of oneself. But this coming-out-of-oneself must not lead to losing oneself. The book, Occult Science, an Outline, was written from such a knowledge as I have described.

Source: Rudolf Steiner – GA 305 – Esoteric Development: Lecture IV: The Attainment of Spiritual Knowledge – Oxford, August 20, 1922

practical-philosophy