“Those who made the decisions with imperfect knowledge will be judged in hindsight by those with considerably more information at their disposal and time for reflection.”

“There are known knowns, things we know that we know; and there are known unknowns, things that we know we don't know. But there are also unknown unknowns, things we do not know we don't know.”

“If in doubt, don't. If still in doubt, do what's right.”

“Let your family, staff, and friends know that you're still the same person, despite all the publicity and notoriety that accompanies your position.”

“Don't necessarily avoid sharp edges. Occasionally they are necessary to leadership.”

“In our system leadership is by consent, not command. To lead a President must persuade. Personal contacts and experiences help shape his thinking. They can be critical to his persuasiveness and thu...”

“Knowledge, like air, is vital to life. Like air, no one should be denied it.”

“Science is organized knowledge. Wisdom is organized life.”

“I definitely learned a lesson this time. I know that I can be broken. I am not as tough as I thought. I see it now. At this point, it's the only thing good that came out of all of this. I know myse...”

“Statistics is the grammar of science.”

“You cannot feed the hungry on statistics.”

“Happiness statistics may be most valuable in smaller, local discussions. Understanding how different sorts of programs affect the well-being of citizens would be enormously helpful to a mayor choos...”