Each of us carries a word in his heart, a “no” or a “yes.”

-Martin E. P. Seligman
Learned Optimism: How to change Your Mind and Your Life

A “no” person, a pessimist, focuses on why something is impossible, why things won’t work out. A “yes” person, an optmist, sees the possiblities. He or she expects things to work out and looks for ways to help that happen. Write about someone who you know who definitely either has a “no” or a “yes.”