I have never told this story, nor shall mortal man see this manuscript until after I have passed for eternity.
-- John Carter (Chapter 1)

Importance: In writing his manuscript about his Martian adventures, John Carter admits that much of what the reader is about to read will seem unbelievable. As such, he refuses to have it published until after his death in order to avoid being mocked and challenged in the public square while still alive. The manuscript becomes something of a last testament, speaking for John after John dies.

I opened my eyes upon a strange and weird landscape. I knew that I was on Mars; not once did I question my sanity or my wakefulness… You do not question the fact; neither did I.
-- John Carter (Chapter 3)

Importance: After escaping a horde of Apache Indians, John Carter nearly passes out in a cave. He has an out-of-body experience where he leaves the cave and heads outside to...