"His central characters are the pioneer, the doctor, the scientist, the businessman, and the feminist. The appeal of his best fiction lies in the opposition between his idealistic protagonists and an array of fools, charlatans, and scoundrels - evangelists, editorialists, pseudo-artists, cultists, and boosters."

“She had called Martin a 'lie-hunter,' a 'truth-seeker.' They decided now that most people who call themselves 'truth-seekers'—persons who scurry about chattering of Truth as though it were a tangible separable thing, like houses or salt or bread—did not so much desire to find Truth as to cure their mental itch. In novels, these truth-seekers quested the 'secret of life' in laboratories which did not seem to be provided with Bunsen flames or reagents; or they went, at great expense and much discomfort from hot trains and undesirable snakes, to Himalayan monasteries, to learn from unaseptic sages that the Mind can do all sort of edifying things if one will but spend thirty or forty years in eating rice and gazing on one's navel. To these high matters Martin responded, 'Rot!' He insisted that there is no Truth but only many truths; that Truth is not a colored bird to be chased among the rocks and captured by its tail, but a skeptical attitude toward life. He insisted that no one could expect more than, by stubbornness or luck, to have the kind of work he enjoyed and an ability to become better acquainted with the facts of that work than the average job-holder. ~ Ch. 25”

“It has not yet been recorded that any human being has gained a very large or permanent contentment from meditation upon the fact that he is better off than others.”

“I was brought up to believe that the Christian God wasn't a scared and compromising public servant, but the creator of the whole merciless truth, and I reckon that training spoiled me—I actually took my teachers seriously!”

“Pickerbaugh apparently believed that this research would take six weeks; Martin had hoped to do it in two years; and with the present interruptions it would require two hundred. ~ Ch. 21”

“Slow yellow river flowing, willows that gesture in tepid August airs, and four children playing at greatness, as, doubtless, great men themselves must play.”

“It was of no use. That particular sort of coward and evader he was not, and he lay abed facing all his sins, all his slacknesses, and the merited punishment by a just and angry God. ~ Ch. 5”