“There's a thin line between being a hero and being a memory.” — Optimus Prime · Transformers, 2007 film
“Sometimes even the wisest of men and machines can be in error.” — Optimus Prime · The Transformers, 1980s cartoon
“You may lose your faith in us, but never in yourselves.” — Optimus Prime · Transformers: Revenge of the Fallen, 2009
“We will keep the Cube from the Decepticons at all costs, or die trying.” — Optimus Prime · Transformers, 2007 film
“Freedom is the right of all sentient beings. But sometimes freedom means sacrifice.” — Optimus Prime · Transformers, 2007 film