Some powerful quotes that specifically address overcoming challenges:

1. "In the middle of difficulty lies opportunity." — Albert Einstein
   This quote emphasizes that challenges often present hidden opportunities for growth and innovation.

2. "The greater the obstacle, the more glory in overcoming it." — Molière
   This highlights the idea that overcoming significant challenges leads to greater triumphs.

3. "Obstacles are those frightful things you see when you take your eyes off your goal." — Henry Ford
   This reminds us to stay focused on our goals to overcome obstacles effectively.

4. "It’s not whether you get knocked down, it’s whether you get up." — Vince Lombardi
   This emphasizes resilience and the importance of rising after setbacks.

5. "Challenges are what make life interesting and overcoming them is what makes life meaningful." — Joshua J. Marine
   This quote underscores the value of challenges in making life more fulfilling.

6. "The only thing standing between you and your goal is the story you keep telling yourself as to why you can’t achieve it." — Jordan Belfort
   This highlights the importance of overcoming self-doubt to achieve success.

7. "Turn your obstacles into opportunities and your problems into possibilities." — Roy T. Bennett
   This encourages transforming challenges into opportunities for growth.