Isaac Asimov on violence from his novel Foundation

Violence is the last refuge of the incompetent.

Bill Bryson on Isaac Newton's Principia from A Short History of Nearly Everything

Once in a great while, a few times in history, a human mind produces an observation so acute and unexpected that people can’t quite decide which is the more amazing - the fact or the thinking of it. Principia was one of those moments.

Carl Sagan on our self-consciousness

We are a way for the cosmos to know itself.

The end of the Note to the Reader by Sam Harris from Letter to a Christian Nation

The truth, however, is that many of us may not care about the fate of civilization. Forty four percent of the American population is convinced that Jesus will return to judge the living and the dead sometime in the next fifty years. According to the most common interpretation of biblical prophecy, Jesus will return only after things have gone horribly awry here on earth. It is, therefore, not an exaggeration to say that if the city of New York were suddenly replaced by a ball of fire, some significant percentage of the American population would see a silver lining in the subsequent mushroom cloud, as it would suggest to them that the best thing that is ever going to happen was about to happen: the return of Christ. It should be blindingly obvious that beliefs of this sort will do little to help us create a durable future for ourselves—socially, economically, environmentally, or geopolitically. Imagine the conse­quences if any significant component of the U.S. government actually believed that the world was about to end and that its ending would be glorious. The fact that nearly half of the American population apparently believes this, purely on the basis of religious dogma, should be considered a moral and intellectual emergency.

Charles Darwin: On the Origin of Species - The entangled bank passage

It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth, and to reflect that these elaborately constructed forms, so different from each other, and dependent on each other in so complex a manner, have all been produced by laws acting around us. These laws, taken in the largest sense, being Growth with Reproduction; Inheritance which is almost implied by reproduction; Variability from the indirect and direct action of the external conditions of life, and from use and disuse; a Ratio of Increase so high as to lead to a Struggle for Life, and as a consequence to Natural Selection, entailing Divergence of Character and the Extinction of less-improved forms. Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.

Sam Harris on Jainism and Martin Luther King, Jr. from Letter to a Christian Nation

Take the religion of Jainism as one example. The Jains preach a doctrine of utter non-violence. While the Jains believe many improbable things about the universe, they do not believe the sorts of things that lit the fires of the Inquisition. You probably think the Inquisition was a perversion of the "true" spirit of Christianity. Perhaps it was. The problem, however, is that the teachings of the Bible are so muddled and self-contradictory that it was possible for Christians to happily burn heretics alive for five long centuries. It was even possible for the most venerated patriarchs of the Church, like St. Augustine and St. Thomas Aquinas, to conclude that heretics should be tortured (Augustine) or killed outright (Aquinas). Martin Luther and John Calvin advocated the wholesale murder of heretics, apostates, Jews, and witches.

You are, of course, free to interpret the Bible differently - though isn't it amazing that you have succeeded in discerning the true teachings of Christianity, while the most influential thinkers in the history of your faith failed? Of course, many Christians believe that a harmless person like Martin Luther King, Jr., is the best exemplar of their religion. But this presents a serious problem, because the doctrine of Jainism is an objectively better guide for becoming like Martin Luther King, Jr., than the doctrine of Christianity is. While King undoubtedly considered himself a devout Christian, he acquired his commitment to nonviolence primarily from the writings of Mohandas K. Gandhi. In 1959, he even traveled to India to learn the principles of nonviolent social protest directly from Gandhi's disciples. Where did Gandhi, a Hindu, get his doctrine of nonviolence? He got it from the Jains.

Sam Harris on Christian Literalism from Letter to a Christian Nation

The dubious link between Christian literalism and Christian values is belied by other indices of social equality. Consider the ratio of salaries paid to top-tier CEOs and those paid to the same firms' average employees: in Britain it is 24:1; in France, 15:1; in Sweden, 13:1; in the United States, where 80 percent of the population expects to be called before God on Judgment Day, it is 475:1. Many a camel, it would seem, expects to pass easily through the eye of a needle.