Matt 'Axe' Axelson: Are Mikey and Danny really dead?
Marcus Luttrell: I don't know.
Matt 'Axe' Axelson: Are we dead?
Marcus Luttrell: Not yet.
Matt 'Axe' Axelson: We're good right?
Marcus Luttrell: Fuck yeah. We're solid.
Marcus Luttrell: If I don't go home, you don't go home.
Shane Patton: Anything in life worth doing is worth overdoing. Moderation is for cowards.
Shane Patton: There ain't nothing I can't do. No sky too high, no sea too rough, no muff too tough.
Answer: The exact quote was "there's no medicine in a gunfight," meaning the SEALs couldn't just stop shooting at the enemy to help another SEAL who was injured. They're speaking more broadly of the "Self-aid" concept, where each person needs to look out for himself until someone else can come provide medical assistance.
Excellent answer.