"Progress is a fact. Even so, faith in progress is a superstition. Science enables humans to satisfy their needs. It does nothing to change them. They are no different today from what they have always been. There is progress in knowledge, but not in ethics. This is the verdict both of science and history, and the view of every one of the world's religions. The growth of knowledge is real and - barring a worldwide catastrophe - it is now irreversible. Improvements in government and society are no less real, but they are temporary. Not only can they be lost, they are sure to be. History is not progress or decline, but recurring gain and loss. The advance of knowledge deludes us into thinking we are different from other animals, but our history shows that we are not."

“Science is not distinguished from myth by science being literally true and myth only a type of poetic analogy. While their aims are different, both are composed of symbols we use to deal with a slippery world.”

“The belief in unity that has fuelled so many utopian dreams is an effort to reconcile the irreconcilable that ends in repression. Berlin suggests we renounce this venerable faith, and learn how to live with intractable conflict.”

“Human knowledge increases, while human irrationality stays the same. Scientific inquiry may be an embodiment of reason, but what such inquiry demonstrates is that humans are not rational animals. The fact that humanists refuse to accept the demonstration only confirms its truth.”

“Freud taught that for any human being kindness or cruelty, having a sense of justice or lacking it, depend on the accidents of childhood. We all know this to be true, but it goes against much of what we say we believe. We cannot give up the pretence that being good is something anyone can achieve. If we did, we would have to admit that, like beauty and intelligence, goodness is a gift of fortune. We would have to accept that, in the parts of our lives where we are most attached to it, freedom of the will is an illusion.”

“Action preserves a sense of self-identity that reflection dispels. When we are at work in the world we have a seeming solidity. Action gives us consolation for our inexistence. It is not the idle dreamer who escapes from reality. It is practical men and women, who turn to a life of action as a refuge from insignificance.”

“Gamblers wager for the sake of playing. Among those who fish for pleasure, the best fisherman is not the one who catches the most fish but the one who enjoys fishing the most. The point of playing is that the play has no point.”