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Even the feel of her hand was the same-warm and confident ; and sinking into a chair , he said : `` Please go on , and let me chip in . '' `` We were quarrelling about the Universe , Captain Fort , '' said the man in khaki ; `` delighted to have your help . I was just saying that this particular world has no particular importance , no more than a newspaper-seller would accord to it if it were completely destroyed tomorrow -- '' . rrible catastrophe , total destruction of the world -- six o'clock edition-pyper ! ' I say that it will become again the nebula out of which it was formed , and by friction with other nebula re-form into a fresh shape and so on ad infinitum -- but I ca n't explain why . My wife wonders if it exists at all except in the human mind -- but she ca n't explain what the human mind is . My father-in-law thinks that it is God 's hobby -- but he ca n't explain who or what God is .