“Beware of false knowledge; it is more dangerous than ignorance.”

“My dear: in this world there is always danger for those who are afraid of it.”

“The fact that a believer is happier than a skeptic is no more to the point than the fact that a drunken man is happier than a sober one. The happiness of credulity is a cheap and dangerous quality of happiness, and by no means a necessity of life.”

“Marriage is the most licentious of human institutions--I say the most licentious of human institutions: that is the secret of its popularity.And a woman seeking a husband is the most unscrupulous of all the beasts of prey. The confusion of marriage with morality has done more to destroy the conscience of the human race than any other single error.”

“Democracy is a device that ensures we shall be governed no better than we deserve.”

“What we want to see is the child in pursuit of the knowledge not the knowledge in pursuit of the child.”

“A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.”