Lyric discussion by voice.of.reason? 

Cover art for Aegis lyrics by Mars Volta, The

It sounds like the narrator of the song is facing down a terrible fate, and has opted for death instead. There's no way of him or her escaping whatever that fate should be, and the only option they have left is to accept whatever fate they have or die.

Also I'm pretty sure the last line of the song is "I am running away", which makes it even more poignant I guess. The person is prepared to go take one for the team, not running away from their death, but in the end they're not brave enough take the bullet.