Space. Space. I'm in space. SPAAAAAAACE!
You know, being Caroline taught me a valuable lesson. I thought you were my greatest enemy, when all along you were my best friend. The surge of emotion that shot through me when I saved your life taught me an even more valuable lesson – where Caroline lives in my brain.
GLaDOS
We both said a lot of things that you're going to regret. But I think we can put our differences behind us. For science. You monster.
GLaDOS
Space. Space. I'm in space. SPAAAAAAACE!
Space Core
Science isn't about why! It’s about why not!
Cave Johnson
Most test subjects do experience some cognitive deterioration after a few months in suspension. Now you've been under for... quite a lot longer, and it's not out of the question that you might have a very minor case of serious brain damage.
Wheatley
When life gives you lemons, don't make lemonade. Make life take the lemons back!
Cave Johnson
The best solution to a problem is usually the easiest one. And I'll be honest - killing you is hard.
GLaDOS