Similarties and different between william kamkwamba's story and calvin standley's story

The both stories states the hope and preserverance is needed in a situation that you feel that there is no solution. The 2 stories implies the positive outcome that could inspire people in a lower class or has a disability to move forward no matter what happen and never give up on their dreams because ain't no mountain high enough for a person with a hope as high as the sky.

https://www.wattpad.com/72405179-an-analysis-of-ernest-hemingway%27s-use-of-symbolism