Full Idea
Philosophy is indispensable for education because it draws knowledge into an artistic conception of the world, and thereby ennobles it.
Gist of Idea
Philosophy ennobles the world, by producing an artistic conception of our knowledge
Source
Friedrich Nietzsche (Unpublished Notebooks 1872-74 [1873], 19 [052])
Book Reference
Nietzsche,Friedrich: 'Unpublished of 'Unfashionable Obs' period (v 11)', ed/tr. Gray,Richard T. [Stanford 1995], p.21
A Reaction
I take this to be an unusual way of saying that philosophy aims at the unification of knowledge, which is roughly my own view. It has hard for us to keep believing that life could be 'ennobled'.