§144

Wittgenstein says that the point of him pointing out that learning might come to an end at a certain point is to reorient us. - To change our way of looking at things. His point is to get us to stop thinking about understanding as an inner state or process from which applications flow and to orient us towards thinking of understanding as akin to an ability.

How does he do this? - The language game of §143 draws our attention to the grounding of our conceptual understanding on being able to imitate.