Https://www.cliffsnotes.com/literature/p/poes-short-stories/summary-and-analysis/the-telltale-heart
This may help you, probably more than me.
It is exclamation point because for example, the person who is staying this sentence probably was astonished, or find it interesting so he/she said this sentence.
Dr. V in "Helping Other to See" and the author of "A Ball to Roll Around" is similar in a way that both are trying to move past the problems of blindness. Dr. V. who is blind and the author both are a great inspiration to other people. It help builds self-confidence in spite of the disability they have.
