"The greatest danger for most of us is not that our aim is too high and we miss it, but that it is too low and we reach it."

"I am, in point of fact, a particularly freakish specimen."

"The secret of genius is to carry the spirit of the child into old age, which means never losing your enthusiasm."

"There are things known and there are things unknown, and in between are the doors of perception."

"The world is full of people who are trying to get to the top, but they don’t know where they are going."