"A knowledge of Mendelism is recognized by me as only the ABC to the broader knowledge of heredity necessary for success in animal and plant improvement, and all variations and all mutations of every nature are responses to environment which, by repetition and combination, are slowly but surely fixed in heredity and at last made tangible, most often through the crossing of varieties, species, or genera, either by nature or that part of nature called man."

“It is increasingly necessary to impress the fact that there are two distinct lines in the improvement of any race: the environment which brings individuals up to their best possibilities; the other, ten thousand times more important and effective, selection of the best individuals through a series of generations.”

“Sex is not a necessary attribute of all living things.. a most necessary attribute if progress in evolution of new forms is to occur, as they have progressed through the ages and as we now see them progressing on this planet.”

“Here appears a child plainly not normal, what shall we do with him? Shall we, as some have advocated, even from Spartan days, hold that the weaklings should be destroyed? No. In cultivating plant life, while we destroy much that is unfit, we are constantly on the lookout for what has been called the abnormal, that which springs apart in new lines. How many plants are there in the world to-day that were not in one sense once abnormalities? No; it is the influence of cultivation, of selection, of surroundings, of environment, that makes the change from the abnormal to the normal. From the children we are led to call abnormal, may come, under wise cultivation and training, splendid normal natures.”

“The essential basis of life itself, namely,, is a substance composed largely of water and having the physical constitution of a viscid liquid.”

“Nature has time without limit, but man has immediate need for better and still better food, houses and clothing, and our present state of civilization depends largely upon the improvements of plants and animals which have consciously and half-consciously been made by man, and future civilization must more and more depend upon scientific efforts to this end.”

“Those who are making history seldom have time to record it.”