Who Said It? Motivational Quote Quiz

Sara Blakely, Founder of Spanx and named in Time magazine's "Time 100" annual list of the 100 most influential people in the world.

Alexa von Tobel, founder and CEO of LearnVest and author of the New York Times bestseller "Financially Fearless".

Elon Reeve Musk, CEO and CTO of SpaceX, CEO and product architect of Tesla Motors.

Sheryl Sandberg, COO of Facebook, one of the 50 "Most Powerful Women in Business" by Fortune Magazine:.

Dan Ariely, professor of Psychology and Behavioral Economics at Duke University and founder of The Center for Advanced Hindsight.

Simon O. Sinek, leadership speaker and author of "Start With Why" and "Leaders Eat Last".

Theodore Roosevelt, the 26th President of the United States.

Harry S. Truman, the 33rd President of the United States.

Abraham Lincoln, the 16th President of the United States.

Oprah Winfrey, media proprietor, talk show host, actress, producer, and philanthropist.

Steven Spielberg, American director, producer and screenwriter.

Marilyn Monroe, American actress and model.