Motivational Quote: Challenge Breeds Change

Challenge-Change

I stole this phrase from my trainer. He says it ALL THE TIME during tough workouts. I usually hate it at the time. (Screaming inside, WHY IS THIS SO HARD?) But when it's over, I'm so proud. I feel leaner and stronger. I feel changed! 

 Do you challenge yourself in the gym, or in other aspects of your life?

When you have, was there a pay-off? Did it change you for the better?