This culture of cruelty is what drives decent people from public service, and what makes millions of Americans recoil from politics, and even from participating in our democracy. Vice President Biden has spoken openly — and courageously, in my view — about the pain of his severe childhood stutter. He takes time to reach out to children who have suffered as he did.

As I grew older, I learned to manage and overcome my stuttering, through much hard work and intense focus. I learned to slow down and to enunciate each word with precision. I joined the church choir, and found that singing helped me to practice controlling my breath, and the formation of words. I learned to resist and overcome the bullying.

I also learned that our imperfections do not define us.

The fact that I once stuttered did not keep me from being a successful U.S. Air Force fighter pilot, an airline pilot, or even a public speaker.

And on that frigid day in January 2009, when I had to tell the air traffic controller at New York Departure Control that I was about to land US Airways Flight 1549 in the Hudson River, after a bird strike following takeoff caused both engines to fail, my words came out with precision and control, even in the stress of a life-threatening emergency.

So, to every child who feels today, what I felt, after hearing those cruel remarks by an adult who should know better, here is what I want you to know:

You are fine, just as you are. You can do any job you dream of when you grow up. You can be a pilot who lands your plane on a river and helps save lives, or a president who treats people with respect, rather than making fun of them. You can become a teacher to kids who stutter. A speech disorder is a lot easier to treat than a character defect. You become a true leader, not because of how you speak, but because of what you have to say — and the challenges you have overcome to help others. Ignore kids (and adults) who are mean, or don’t know what it feels like to stutter. Respond by showing them how to be kind, polite, respectful and generous, to be brave enough to try big things, even though you are not perfect.