We have got onto slippery ice where there is no friction and so in a certain sense the conditions are ideal, but also, just because of that, we are unable to walk. We want to walk so we need friction. Back to the rough ground!

-Philosophical Investigations(Wittgenstien)

이 문장을 한국어 번역본에서 인용해야 하는데, 한국어 번역본의 번역이 무엇이고 몇 쪽에 있는지 알려줄 수 있을까?