“That's a horrible dream!" Major Sanderson cried. "It's filled with pain and mutilation and death. I'm sure you had it just to spite me. You know, I'm not even sure you belong in the Army, with a disgusting dream like that.”
“I'm not sure if you even want me around or if you just feel sorry for me. I'm not sure of anything.”
“I know my dreams will be of you, and I'm not sure how I'll stay away from you in the morning.”
“Not knowing is half the fun," Aphrodite said, "Exquisitely painful isn't it? Not being sure who you love and who loves you? Oh, you kids! It's so cute I'm going to cry!”
“I'm not sure if my dream is a dream, or a nightmare.”
“You think you know me, but I'm not sure that even I know who I am anymore.”