在《变形金刚2》的结尾部分，擎天柱发表了以下独白：

1. "With the Allspark gone, we cannot return life to our planet. And fate has yielded its reward: a new world to call home. We live among its people now in plain sight, but watching over them in secret, waiting, protecting."

2. "I am Optimus Prime, and I send this message to any surviving Autobots taking refuge among the stars: we are here, we are waiting."

这些台词表达了擎天柱对自己和同伴们新生活的喜悦之情，并强调了他们的信念——自由和正义。