I'm afraid that time has passed. [he sounds disappointed] You know too much.

[wearily] My dear girl, think what the term "clean slate" means. It means a fresh start; one free of any and all prejudices. Meaning that should I choose, you will remember nothing of this encounter. None of you would remember this meeting or anything that has happened since your arrival here. In a sense, you would be arriving again for what would be, to you, the first time.