Who said "I believe in what we're doing."?

This quote is attributed to Steve Trevor.

I believe in what we're doing. - Steve Trevor

"I believe in what we're doing."

Steve Trevor

"I can save today. You can save the world."

"It's what you believe that makes you who you are."

"I've learned that not everyone deserves the truth."

"The only thing that stops a bad guy with a gun is a good guy with a gun."