“The important thing is not to stop questioning. Curiosity has its own reason for existing.”— Albert Einstein
“The great question that has never been answered, and which I have not yet been able to answer, despite my thirty years of research into the feminine soul, is 'What does a woman want?'”— Sigmund Freud
“What is the essence of mathematics? It is asking a question that has a definite answer, and then finding it.”— Marilyn vos Savant
“And now, José? The party is over, the light is out, the people have gone, the night is cold, and now, José?”— Carlos Drummond de Andrade
“I'm quite good at asking the question that everyone's thinking but is too polite to ask.”— Lynn Barber
“Ask a stupid question, you may feel stupid; don't ask a stupid question, you remain stupid.”— Ted Koppel
“The mind of man has perplexed itself with many hard questions. Is space infinite, and in what sense? Is the material world infinite in extent... Do atoms exist or is matter infinitely divisible?”— James Clerk Maxwell