Here are some short encouraging quotes that I found:

- "You are never too old to set another goal or to dream a new dream." - C.S. Lewis
- "Believe you can and you're halfway there." - Theodore Roosevelt
- "You are never too old to set another goal or to dream a new dream." - C.S. Lewis
- "The only way to do great work is to love what you do." - Steve Jobs
- "Believe in yourself and all that you are. Know that there is something inside you that is greater than any obstacle." - Christian D. Larson

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