The whole question is really: “can it strike you what a thing is?”
1


It seems you can find out something about the nature of a thing by experience. About its internal nature.
     
     Thus e.g. a similarity can strike you; the fact that a complex contains a constituent; even
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identity of shape. Two tunes fitting.

Editorial notes

1) Ms-148, page 17r contains a figure which doesn't seem related to the surrounding text and is not included in the transcription.