Knowledge

"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."
— Stephen Hawking, Attributed

"If I have seen further it is by standing on the shoulders of Giants."
— Isaac Newton, Letter to Robert Hooke, 1675

"Imagination will often carry us to worlds that never were, but without it we go nowhere."
— Carl Sagan, Cosmos

Socrates (via Plato)
"The only true wisdom is in knowing you know nothing."
Source: Apology of Socrates

Simone de Beauvoir
"Change your life today. Don’t gamble on the future, act now, without delay."
Source: The Second Sex

Confucius
"Real knowledge is to know the extent of one's ignorance."
Source: Analects