Full Idea
One should have a philosophy only to the extent that one is capable of living according to this philosophy: so that everything does not become mere words.
Gist of Idea
You should only develop a philosophy if you are willing to live by it
Source
Friedrich Nietzsche (Unpublished Notebooks 1872-74 [1873], 30 [17])
Book Reference
Nietzsche,Friedrich: 'Unpublished of 'Unfashionable Obs' period (v 11)', ed/tr. Gray,Richard T. [Stanford 1995], p.299