If a stranger tells you to do something because is is very important, you tend not to get inspired.

If a famous person you admire says the same thing, however, maybe you would react differently.

I think this “using famous person” is a great way to make an impact at a national policy level.
21 June 2013 – Stevie Wonder has appealed to more than 600 negotiators at a United Nations forum in Marrakesh to finalize a new global treaty easing access to books for blind, visually impaired, and other print disabled people.

“The time has come. Today. Not tomorrow. Today. The world’s blind and visually impaired are counting on you. I am counting on you. Don’t let me down. But most of all, please don’t let them down. This is our legacy. Your gift to future generations,” he urged.

This Stevie Wonder, now a world famous artist, was also inspired by one school teacher when she encouraged his extraordinary hearing skill when he was 9.
One day in class, his teacher said she heard a sound of mouse in a room, which made all the kids start freaking out.
However, Stevie sat quietly at his desk listening. The teacher calmed the class down and told Stevie to find the mouse for them. He was excited that he’d been given such an important assignment. He tilted his head listening and located the mouse without anyone else being able to hear it. The mouse became the classroom pet and Stevie found out that he had extraordinary hearing.

The seed was planted and watered in his classroom which became a great tree of music later on.
It seems to me that he is saying that “now is my turn to plant seeds” for people with hearing problem to become encouraged and to live happily.