Here are some quotes about getting better that I found:

- "Every day, in every way, I'm getting better and better." - Emile Coue
- "The only way you gain mental toughness is to do things you're not happy doing. If you continue doing things that you're satisfied and make you happy, you're not getting stronger. You're staying where you're at." - George Allen Sr.
- "Either you're getting better, or you're getting worse. You're not staying the same." - Joe Paterno
- "If everything is perfect and I’m miserable, then is this as good as it gets? The answer is no. it gets better. You get better." - Wendy Mass

I hope these quotes help! Let me know if there's anything else I can help you with.