Bob Marley - "If she's amazing she won't be easy. If she's easy, she won't be amazing. If she's worth it, you won't give up. If you give up, you're not worthy . Truth is, everybody is going to hurt you; you just gotta find the ones worth suffering for.
An arrow can only be shot by pulling it backward. So when life is dragging you back with difficulties, it means that it's going to launch you into something great. So just focus, and keep aiming. My arrow tattoo next!
Just because you aren't given the credit and haven't been recognised for your work doesn't mean you have to give up or stop. You don't always need credit, other people do not always have to know what you are capable of doing as long as you do.