“It is not enough to discover and prove a useful truth previously unknown, but that it is necessary also to be able to propagate it and get it recognized.”

The form follows the function.

It is not always the magnitude of the differences observed between species that must determine specific distinctions, but the constant preservation of those differences in reproduction.

All knowledge that is not the real product of observation, or of consequences deduced from observation, is entirely groundless and illusory.

Habits form a second nature.

What nature does in the course of long periods we do every day when we suddenly change the environment in which some species of living plant is situated.

All known living bodies are sharply divided into two special kingdoms, based upon the essential differences which distinguish animals from plants, and in spite of what has been said, I am convinced that these two kingdoms do not really merge into one another at any point.

It is not the organs-that is, the character and form of the animal’s bodily parts-that have given rise to its habits and particular structures. It is the habits and manner of life and the conditions in which its ancestors lived that have in the course of time fashioned its bodily form, its organs and qualities.

The courage that dares without recognition, without the protection of media attention, is a courage that humbles and inspires and reaffirms our faith in humanity.

For contemporary judgment does not recognize that much depth of soul is needed to light up the picture drawn from contemptible life and elevate it into a pearl of creation.

See, even despite pious statements to the contrary, much of the industrialized world has not yet come to terms with the recognition of the fallacy of what I call the strong man syndrome.

Every generation must recognize and embrace the task it is peculiarly designed by history and by providence to perform.

The thing is, I don’t do these things for recognition, being a good teammate, being a positive member of the community. I do them because those things make me whole and complete.

The theory of the permanent revolution, in contradiction to the theory of socialism in one country, was recognized by the entire Bolshevik party during the period from 1917 to 1923.

The love of money as a possession. Will be recognised for what it is, a somewhat disgusting morbidity.

To preserve the human race, it is now necessary to reorganize society. To this end, an Authority must be created with the power to control human population, to redistribute food, to purify air, water, soil, to re-pattern the cities.