I mean, it ain't a slogan, but it's the only piece of poetry that ever stuck with me:
“Fight on my men, Sir Andrew said
I am hurt, but I am not slain;
I'll lay me down and bleed a-while,
And then I'll rise and fight again.”
Life is kind of like being a Buffalo Bills fan right? It might crap all over you sometimes. But you have to get up and keep going. Maybe you'll make your goal, maybe you won't. But you have to keep trying.