Inception

"I think positive emotion trumps negative emotion every time."

"I know how to find secrets from your Mind, I know all the tricks!"

"Man, couldn't someone have dreamt up a goddamn beach?"

"I'm going to improvise. Listen, there's something you should know about me... about inception. An idea is like a virus, resilient, highly contagious. The smallest seed of an idea can grow. It can grow to define or destroy you."

"Do you think you can just build a prison of memories to lock her in? Do you really think that that's gonna contain her?"

"No creeping doubts? Not feeling persecuted, Dom? Chased around the globe by anonymous 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."

"Great. Thank you. So, now we're trapped in Fischer's mind battling his own private army, and if we get killed, we'll be lost in limbo till our brains turn to scrambled egg."

Ariadne: "My subconscious seems polite enough."
Arthur: "Well wait, it'll turn ugly. No one wants to feel someone else messing around their mind."