"It is for us to pray not for tasks equal to our powers, but for powers equal to our tasks."

"I do not want to be a burden on anyone."

"No pessimist ever discovered the secrets of the stars, or sailed to an unchartered land, or opened a new heaven to the human spirit."

"The public must learn that the blind man is neither a genius nor a mountebank. He has a right to his share in the work of the world."

"You can't be a little bit pregnant."