What quote can I put my binder for school to keep me motivated?

I have come a long way at the end of 6th grade my grades were C's, D's and F's and at the end of 7th grade I got honors of mostly B's. It's still not good enough for me. Since my brother is in all honors classes with straight A's in highschool. I want to be like him. I want to get into the same catholic high shchool as him. And for 8th grade I want to be a straight A's. Im very motivated to be like him but what is a quote that I could put on my binder to keep me like that? I have searched everywhere. Does anybody have an idea?