Ok, the metaphor is a critical puzzle piece then as it doesn’t work as a statement without it.
Our brains form analogies to learn. We know what we know, however that is, at whatever point were at.
New knowledge or experience comes in.
How do we bring it “inside” as it were?
We analogize to existing concepts.
This is most similar to that. It happens automatically.
When there is confusion we have other systems that can work such as deduction and the like. But our primarily knowledge acquisition is via analogy.