Its all in how we see it

I heard this story today...There was an old lady begging for money .She was sitting on the corner holding a sign that said blind please help....A man passed and saw that she only had two quarters in her cup...He stood and watched her and saw that no one stopped. He took her sign turned it over and wrote another message...He left and came back an hour later and her cup was almost full..He told her he was glad that things were looking up. She asked him what he wrote that made people stop and he said I wrote the seasons are changing and I cant see them....Please help...