how does the quote "there are so many ways to be brave in this world. sometimes bravery involves laying down your life for something bigger than yourself.. for the sake of something greater" (page 509) reveal traits of Tobias?

Tobias is very courageous. He also has a worldly perspective. Tobias understands that he is only a very small part of the struggle. He knows that sacrificing his life might well be his ultimate contribution to the fight. He knows there are forces at work that are larger than his survival.