Nature can't evolve a species that hasn't the will to survive. Individuals might be bred to sacrifice themselves, but the race as a whole can never cease to exist.
Orson Scott CardHuman beings may be miserable specimens, in the main, but we can learn, and, through learning, become decent people.
Orson Scott CardIf I wanted to doubt, then I could doubt endlessly, but at some point a person has to stop questioning and act, and at that point you have to trust something to be true. You have to act as if something is true, and so you choose the thing you have the most reason to believe in, you have to live in the world that you have the most hope in.
Orson Scott Card