Keith Urban found himself in a very deep conversation with co-writer Monty Powell when the two sat down to write a song for upcoming Navy SEALS movie Act of Valor.

"It was just a lot of talking about philosophies. How do we feel philosophically about the film and the broader conversation about war. . . . That can get very polarizing. It’s a very passionate subject," Keith told CountryWeekly.com on the red carpet of a Nashville screening of the movie Tuesday night (Feb. 7).

Keith, though, wants to get past that conversation and into one about sacrifice.

"The impetus for the song is really about little ol' me the movie watcher. What am I willing to give my all for? Even metaphorically, am I willing to give my all to something? What do I believe in?" he said.

"It’s easy to sit and watch a film and have whatever opinion you want to have about the SEALS and whatever else. But it’s so much more than that to me. It’s a much bigger question about the willingness to give myself to something I believe in."

Keith scored the coveted closing-credits song for the movie. Country artists Sugarland, Lady Antebellum, Trace Adkins, Jake Owen, Montogmery Gentry, Josh Kelley, Hunter Hayes and Wynonna also have songs on Act of Valor: The Album, which comes out Feb. 21.

The movie, which stars active-duty Navy SEALS, comes out Feb. 24.