NB: Very mild spoilers for Portal 2.

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What is the allure of testing?
Never resting, striving after
New disasters for the test
To best a challenge thrown
By unknown opponents
Enter the ring

Testing, proving,
Trying, moving,
Thinking, knowing,
Learning, growing.

GLaDOS knows her drive, her itch,
That which she says no longer rules her
Nothing fools her but herself, perhaps,
With traps of escalation.
The player, though, as well
As Chell, why seek the danger?
What is stranger than the human need
To feed on tribulation?

Testing, proving,
Trying, moving,
Thinking, knowing,
Learning, growing.

Tests are problems with solutions
Sweet dilutions of real stress
Lived duress with no way out
No doubt that’s why we fly
To try our metal in a place
With rules and bounds.

Testing, proving,
Trying, moving,
Thinking, knowing,
Learning, growing.