Quote by Barack Obama

"Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek."

"The future rewards those who press forward. I know that'll be the United States of America."

"If you're walking down the right path and you're willing to keep walking, eventually you'll make progress."

"There is not a liberal America and a conservative America - there is the United States of America."

"Science helps us understand the world."

"I've witnessed the birth of science, and it continues to amaze me."

"I'm something of a scientist myself."

"The fusion process is self-sustaining now!"