And yet, Ayesha, you speak as though you have lived all through that gulf of time, and in this there must be error, because it is impossible.

Therefore I suppose you to mean that this history has come down to you in writing, or perhaps in dreams.
I believe that even in such far-off times there were writers of romance, and we all know of what stuff dreams are made.

At least this thought comes to me," I added hurriedly, fearing lest I had said too much, "and one so wise as you are, I repeat, knows well that a woman who says she has lived two thousand years must be mad or--suffer from delusions, because I repeat, it is impossible." At these quite innocent remarks she sprang to her feet in a rage that might truly be called royal in every sense.
"Impossible! Romance! Dreams! Delusions! Mad!" she cried in a ringing voice.

"Oh! of a truth you weary me, and I have a mind to send you whither you will learn what is impossible and what is not.

Indeed, I would do it, and now, only I need your services, and if I did there would be none left for me to talk with, since your companion is moonstruck and the others are but savages of whom I have seen enough.
"Hearken, fool! _Nothing_ is impossible.