People
A good guide will take you through the more important streets more often than he takes you down side streets; a bad guide will do the opposite. In philosophy I’m a rather bad guide.
— Ludwig Wittgenstein

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
A guide comparison used to poke fun at the speaker's own teaching. Good guides stick to main streets and visit side streets less often, while bad ones do the reverse. Claiming to be a bad guide in philosophy means wandering into the side streets a lot.
Context reviewed