Ironhide: Why are we fighting to save the humans? They're a primitive and violent race.
Optimus Prime: Were we so different? They're a young species. They have much to learn. But I've seen goodness in them. Freedom is the right of all sentient beings. You all know there's only one way to end this war: we must destroy the Cube. If all else fails, I will unite it with the spark in my chest.
Ratchet: That's suicide! The Cube is raw power, it could destroy you both!
Optimus Prime: A necessary sacrifice to bring peace to this planet. We cannot let the humans pay for our mistakes. It's been an honor serving with you all.
The Autobots congregate above Sector Seven, the location that they followed Simmons to.