Then - suppose, if you will - of a World with no connection to the one you're familiar with - that had the capability to draw you here, and provide you with wings to support your ability to live in it. Suppose then, that you're kept separated from the greater part of that World by a barrier, designed to both keep you inside and keep other things out. In this enclosure you are provided with all you'll ever need, since there is no commerce; food, shelter, books - and, well, company of those who are in a similar situation. And ... eventually you are sent back to where you came from.

[Or will remember the truth. But she knows Nephry will retain even this memory, until she truly does leave the world. Even if this Nephry isn't aware of that.]