The Mysteries of Existence

There are mysteries regarding existence that are sufficiently complex, obscure, opaque or recondite that none of us can ever hope to fathom. Questions such as, what is this world? Why are we here? What is the good life? How ought we to live? Are our lives and the reality we find ourselves in akin to a dream, or, alternatively, of some ultimate importance?  In a shrewdness of apes, would the most intelligent ape have any hope of reaching any type of tentative answers to these questions at all?  Shrewd he might be, but I guess that he most emphatically would not. But then, why do we imagine human beings are any better equipped to answer such questions?