Quote by Martina Navratilova
"I've learned that happiness is a choice, not a circumstance."
More from Martina Navratilova
"The difference is that I came into the world in a situation where I could play tennis. Not everyone has the same opportunity, so I should make the most of it."
"I really believe that you have to work hard for what you want."
"Whoever said money can't buy happiness simply didn't know where to go shopping."
"Be bold. If you're going to make an error, make a doozy, and don't be afraid to hit the ball."