“Like its master, it was entirely devoid of hair, but was of a dark slate color and exceeding smooth and glossy. Its belly was white, and its legs shaded from the slate of its shoulders and hips to a vivid yellow at the feet. The feet themselves were heavily padded and nailless, which fact had also contributed to the noiselessness of their approach, and, in common with a multiplicity of legs, is a characteristic feature of the fauna of Mars. The highest type of man and one other animal, the only mammal existing on Mars, alone have well-formed nails, and there are absolutely no hoofed animals in existence there.”

“Later, Thuran also found it necessary to construct a similar primitive garment, so that, with their bare legs and heavily bearded faces, they looked not unlike reincarnations of two prehistoric progenitors of the human race. Thuran acted like one.”

“With man it is different. When he comes many of the larger animals instinctively leave the district entirely, seldom if ever to return; and thus it has always been with the great anthropoids. They flee man as man flees a pestilence.”

“Imagine, if you can, a huge grizzly with ten legs armed with mighty talons and an enormous froglike mouth splitting his head from ear to ear, exposing three rows of long, white tusks. Then endow this creature of your imagination with the agility and ferocity of a half-starved Bengal tiger and the strength of a span of bulls, and you will have some faint conception of Woola in action.”

“No fiction is worth reading except for entertainment. If it entertains and is clean, it is good literature, or its kind. If it forms the habit of reading, in people who might not read otherwise, it is the best literature.”

“[The little black boy] had seen Tarzan bring down a buck, just as Numa, the lion, might have done... Tibo had shuddered at the sight, but he had thrilled, too, and for the first time there entered his dull, Negroid mind a vague desire to emulate his savage foster parent. But Tibo, the little black boy, lacked the divine spark which had permitted Tarzan, the white boy, to benefit by his training in the ways of the fierce jungle. In imagination he was wanting, and imagination is but another name for super-intelligence.Imagination it is which builds bridges, and cities, and empires. The beasts know it not, the blacks only a little, while to one in a hundred thousand of earth's dominant race it is given as a gift from heaven that man may not perish from the earth.”

“Emerging, as we had, from the dark and gloomy bowels of the earth, the scene before us presented a view of wondrous beauty, and, while doubtless enhanced by contrast, it was nevertheless such an aspect as is seldom given to the eyes, of a Barsoomian of today to view. To me it seemed a little garden spot upon a dying world preserved from an ancient era when Barsoom was young and meteorological conditions were such as to favor the growth of vegetation that has since become extinct over practically the entire area of the planet. In this deep valley, surrounded by lofty cliffs, the atmosphere doubtless was considerably denser than upon the surface of the planet above. The sun's days were reflected by the lofty escarpment, which must also hold the heat during the colder periods of night, and, in addition to this, there was ample water for irrigation which nature might easily have achieved through percolation of the waters of the river through and beneath the top soil of the valley.”