The context is from the Inception movie:
Ariadne and Cobb enter Mal and Cobb's home]
Dom Cobb: An idea is like a virus, resiliant, highly contagious and the smallest seed of an idea can grow. It can grow to define or destroy you. [they find Mal sitting in their kitchen table]
Mal: A smallest idea such as 'your world is not real'. Simple little thought that changes everything. You're so certain of your world, of what's real. Do you think he is? Or do you think he's as lost as I was?
Dom Cobb: I know what's real, Mal.
Mal:No creeping doubts? Not feeling persecuted, Dom? Chased around the globe by annonymous corporations and police forces, the way the projections persecute the dreamer? Admit it, you don't believe in one reality anymore. So choose, choose to be here, choose me.
Could you explain what she was trying to say by these two sentences?