Perseverance is defined as "steady persistence in a course of action, a purpose, a state, etc., especially in spite of difficulties, obstacles, or discouragement." (from Dictionary.com) On Thursday last week, I posted a video that showed artist Pierre-Auguste Renoir who managed to paint after developing rheumatoid arthritis. It is amazing what individuals with handicaps manage to do by persevering!
Giffords, Gabrielle D. Gabby: A Story of Courage and Hope. [AB/CD B GIF]
Hamilton, Bethany. Soul Surfer: A True Story of Faith, Family, and Fighting to Get Back on the Board. [YA B HAM]
Keller, Helen. The Story of My Life. [ebook]
Maynard, Kyle. No Excuses: The True Story of a Congenital Amputee Who Became a Champion in Wrestling and in Life. [B MAY]
Sherrow, Victoria. Wilma Rudolph. [J B RUD]
I'd also like to suggest Murderball [DVD 796.333 MUR], a documentary film about wheelchair athletes.
These and many others are available to inspire you to overcome whatever obstacles come your way!