[beavus]

Hence, though we see the universe through the lens of reason, the lens (Reason) cannot look at itself and define itself.

Not really. It only means that you can't use the concept of reason as an explanation of reason. You can potentially use reason to understand reason. USING reason as a tool isn't the same as referring to it in an explanation. You can use a hammer to make a hammer.

[HangnJudge]

You can use a hammer to make a hammer.

But you can't use a hammer to explain a hammer, to understand it, or to define it