I get the distinct impression that you don’t understand the text. It doesn’t oppose proof; it merely commends an attitude that holds to a reasonable position in defiance of unreasonable doubt. (See C.S. Lewis in Mere Christianity, Book 3, Chapter 11—or 12; I don’t recall which, right off.) So it’s more about keeping an open mind and holding a view provisionally. So my interpretations can be disproved, and often are—usually by myself or someone who understands the relevant languages, cultures, etc. better than I do.
There are also various types of proof: philosophical, scientific, historical, etc. The proofs for Biblical claims are mostly historical; some are unverified, but we may reasonably accept them provisionally based on the verified claims. Some of the implications can be verified (or at least legitimized) philosophically.
The Biblical narrative about Adam and Eve never comments on whether they had navels, so your remark is senseless. Try reading a text before critiquing it.
The is roughly what happens to Dee Wallace’s character at the end of The Howling.