"For so it had come about, as indeed I and many men might have foreseen had not terror and disaster blinded our minds. These germs of disease have taken toll of humanity since the beginning of things — taken toll of our prehuman ancestors since life began here. But by virtue of this natural selection of our kind we have developed resisting power; to no germs do we succumb without a struggle, and to many — those that cause putrefaction in dead matter, for instance — our living frames are altogether immune. But there are no bacteria in Mars, and directly these invaders arrived, directly they drank and fed, our microscopic allies began to work their overthrow. Already when I watched them they were irrevocably doomed, dying and rotting even as they went to and fro. It was inevitable. By the toll of a billion deaths man has bought his birthright of the earth, and it is his against all comers; it would still be his were the Martians ten times as mighty as they are. For neither do men live nor die in vain."

“In all the round world of Utopia there is no meat. There used to be. But now we cannot stand the thought of slaughter-houses. And, in a population that is all educated, and at about the same level of physical refinement, it is practically impossible to find anyone who will hew a dead ox or pig. We never settled the hygienic question of meat-eating at all. This other aspect decided us. I can still remember, as a boy, the rejoicings over the closing of the last slaughter-house.”

“Nothing could have been more obvious to the people of the early twentieth century than the rapidity with which war was becoming impossible. And as certainly they did not see it. They did not see it until the atomic bombs burst in their fumbling hands.”

“Oswald Cabal: Rest enough for the individual man, too much and too soon, and we call it death. But for Man, no rest and no ending. He must go on, conquest beyond conquest. First, this little planet and its winds and ways. And then all the laws of mind and matter that restrain him. Then the planets about him, and, at last, out across immensity to the stars. And when he has conquered all the depths of space, and all the mysteries of time, still he will be beginning...”

“Every one of these hundreds of millions of human beings is in some form seeking happiness...Not one is altogether noble nor altogether trustworthy nor altogether consistent; and not one is altogether vile...Not a single one but has at some time wept.”

“I had rather be called a journalist than an artist.”

“From 1789 to late in 1791 the French Revolution was an orderly process, and from the summer of 1794 the Republic was an orderly and victorious state. The Terror was not the work of the whole country, but of the town mob which owed its existence and its savagery to the misrule, and social injustice of the ancient regime...More lives were wasted by the British generals alone on the opening day of what is known as the Somme offensive of July, 1916 than in the whole French Revolution from start to finish.”