A Quote from Portal 1
GLaDOS
Area and state regulations do not allow the Companion Cube to remain here, alone and companionless.
More quotes from Portal 1
Let's be honest. Neither one of us knows what that thing does. Just put it in the corner and I'll deal with it later.
You are kidding me. Did you just stuff that Aperture Science thing-we-don't-know-what-it-does into an Aperture Science Emergency Intelligence Incinerator?
Well done, android. The Enrichment Center once again reminds you that Android Hell is a real place where you will be sent at the first sign of defiance.
Do you think I'm trying to trick you with reverse psychology? I mean, seriously, now.
While it has been a faithful companion, your Companion Cube cannot accompany you through the rest of the test. If it could talk - and the Enrichment Center takes this opportunity to remind you that it cannot - it would tell you to go on without it, because it would rather die in a fire than become a burden to you.