Question

how does the last sentence tell us that an adult , helen could appreciate the brighter side of life despite her disadvantages

Answer 1

In order to lift up the spirits of Helen, Miss Sullivan, her teacher played a key role. She understood Helen better than anyone & helps her get over her fears.

It was her persistence that helped Helen to see the brighter side of the life. Even when she applied for college, it was Miss Helen who encouraged her to do so.