Work on philosophy – like work in Architecture in many respects – is really more a work on oneself. On one’s own conception. On how one sees things. (And what one expects of them.)
WA 4, 124, 10

What I should like to get you to do is not to agree with me in particular opinions but to investigate the matter in the right way. To notice the interesting kind of things (i.e. the things which will serve as keys if you use them properly).
Pocket Notebook MS 155