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"Had I been wrong, this would still have been the honorable thing to do. I am very glad, however, to find out that I was right."
"We are programmed to find sex pleasurable for one simple reason—because animals who mate have offspring. Those who do not mate have none. Traits that result in successful reproduction get reinforced and passed on. Evolution is that simple. It is therefore useless to bemoan as evil the fact that men tend toward aggression. Among our ancestors, aggression often helped males have more offspring than their competitors. “Good” and “evil” had little to do with it. That is, until we reached consciousness, at which point, good and evil became pertinent indeed! Behaviors which might be excusable in dumb beasts can seem perverted, criminal, when performed by thinking beings. Just because a trait is “natural” does not oblige us to keep it."

Glen David Brin is an American science fiction author. He has won the Hugo, Locus, Campbell and Nebula Awards. His novel The Postman was adapted into a 1997 feature film starring Kevin Costner.
"Had I been wrong, this would still have been the honorable thing to do. I am very glad, however, to find out that I was right."
"She closed her eyes. And while her intellect wouldn’t let her realize her deepest fear, that all this might soon be gone forever, nevertheless she stood there for a time and worshipped the only way a person like her could worship—in silence and solitude, under the temple of the sky."
"Ideologies are too seductive anyway. It does a man good to see things from a different point of view."
"The lesson they took home with them was simple; it takes a full belly before a man or woman gives a tinker’s damn about anything as large as a planet."
"Nation states are archaic leftovers from when each man feared the tribe over the hill, an attitude we can’t afford anymore."
"It was silly to suppose that trials only hardened men, automatically making them wise. He knew many who were stupid, arrogant, and mean, in spite of having suffered."
"One of the first major steps in the direction of modern skepticism came through the victory of Occam over Aquinas in a controversy about language. The statement that modi essendi were replaced by modi significandi et intelligendi, or that ontological referents were abandoned in favor of pragmatic significations, describes broadly the change in philosophy which continues to our time. From Occam to Bacon, from Bacon to Hobbes, and from Hobbes to contemporary semanticists, the progression is clear: ideas become psychological figments, words become useful signs. ... To one completely committed to this realm of becoming, as are the empiricists, the claim to apprehend verities is a sign of . Probably we have here but a highly sophisticated expression of the doctrine that ideals are hallucination and that the only normal, sane person is the healthy extrovert, making instant, instinctive adjustments to the stimuli of the material world."
"To have success in science, you need some luck. But to succeed in science, you need a lot more than luck. And its not enough to be smart — lots of people are very bright and get nowhere in life. In my view, you have to combine intelligence with a willingness not to follow conventions when they block your path forward."
"I, too, believed it was impossible to change the existing society into one that would be for the benefit of all; neither could I espouse any given ideal for society. But [...] I felt that even if one did not have an ideal vision of society, one could have one’s work to do. Whether it was successful or not was not our concern; it was enough that we believed it to be a valid work. The accomplishment of that work, I believed, was what our real life was about. Yes. I want to carry out a work of my own; for I feel that by so doing our lives are rooted in the here and now, not in some far-off ideal goal."
"We have already mentioned what may, perhaps, appear paradoxical to some of our readers, — that the division of labour can be applied with equal success to mental as to mechanical operations, and that it ensures in both the same economy of time."
"The war was finished. It had lasted ten equivalent years and taken ten million lives. Thus it was neither of long duration nor of serious attrition. It hadnt any great significance; it was not intended to have. It did not prove a point, since all points had long ago been proven. What it did, perhaps, was to emphasize an aspect, sharpen a concept, underline a trend. On the whole it was a successful operation. Economically and ecologically it was of healthy effect, and who should grumble? And after wars, men go home. No, no, men start for home. Its not the same."
"The final test of a leader is that he leaves behind him in other men the conviction and the will to carry on. ... The genius of a good leader is to leave behind him a situation which common sense, without the grace of genius, can deal with successfully."