One of the sections of the book is titled "Mystery" and addresses some of the unanswerable questions Alice finds. Here is a quote from that section:
The White Knight, Carroll's representation of himself, deals with the dark woods around him by loading up his horse with more and more inventions. Of all the beings Alice encounters, he is the one who responds most conscientiously to multi-faceted reality, but he cannot quite keep up with his expanding universe. The truth seems to rest in uncertainty.
Big awwww here (tearing up warning).