I believe that the nature of man is a contradiction rooted in the conditions of human existence that requires a search for solutions, which in their turn create new contradictions and now the need for answers. I believe that every answer to these contradictions can really satisfy the condition of helping man to overcome the sense of separation and to achieve a sense of agreement, of unity, and of belonging. I believe that in every answer to these contradictions, man has the possibility of choosing only between going forward or going back; these choices, which are translated into specific actions, are means toward the regressing or toward the progressing of the humanity that is in us.

This earth is one of the rare spots in the cosmos where mind has flowered. Man is a product of nearly three billion years of evolution, in whose person the evolutionary process has at last become conscious of itself and its possibilities. Whether he likes it or not, he is responsible for the whole further evolution of our planet.

[M]an has always felt and recognised the imperfection of nature, and has never accepted it as law. He broke this law when he took his first step, because his vertical posture challenged gravity, the most universal law of nature. This upright position is not natural to man – it is supranatural – and he has achieved it artificially, through effort (by swaddling and other methods of adaptation). One cannot say of man that he is the creation of nature. On the contrary, he is the result of under-creation, of deprivation, of a natural pauperism which is shared by rich and poor alike; he is a proletarian, a pariah among living creatures. Yet in this lay the origin of his future greatness; deprived of natural cover and means of defence, he had to create all this himself by his own labour. Therefore man values only that which has been created by working, or which expands the area of application of work; it is not difficult to guess that the culmination of this forward movement must be that everything on which human life depends will ultimately be achieved through work, so that humans will depend solely on their labour. Consequently the entire world, the meteorological, telluric and cosmic processes, will be the responsibility of man, and nature will be his work. Man is driven towards this goal by hunger, disease and every other calamity, so that whenever he delays in expanding the area of work, the scope for disasters expands. Thus nature punishes man by death for his ignorance and sloth, and drives him to ever-expanding labour.

Man is born as a freak of nature, being within nature and yet transcending it. He has to find principles of action and decision-making which replace the principles of instincts. He has to have a frame of orientation which permits him to organize a consistent picture of the world as a condition for consistent actions. He has to fight not only against the dangers of dying, starving, and being hurt, but also against another danger which is specifically human: that of becoming insane. In other words, he has to protect himself not only against the danger of losing his life but also against the danger of losing his mind.

Man is not better treated by nature in his first start than her other works are; so long as he is unable to act for himself as an independent intelligence she acts for him. But the very fact that constitutes him a man is that he does not remain stationary, where nature has placed him, that he can pass with his reason, retracing the steps nature had made him anticipate, that he can convert the work of necessity into one of free solution, and elevate physical necessity into a moral law.

A man is but the product of his thoughts. What he thinks, he becomes.

The history of man is a compendium of such evil. We are an evolutionary product, descendants of predators. A few synthetic foods aside, every morsel eaten by man is taken from another living thing. We are intended for murder; we kill to exist!

Human beings are a product of evolution as much as any slime mold, and the revolution of the last two decades in the way scientists now think about evolution has immense implications for mankind as will. To summarize the argument so far, evolution is more about reproduction of the fittest than survival of the fittest; every creature on earth is the product of a series of historical battles between parasites and hosts, between genes and other genes, between members of the same species, between members of one gender in competitions for members of the other gender. Those battles include psychological ones, to manipulate and exploit other members of the species; they are never won, for success in one generation only ensures that the foes of the next generation are fitter to fight harder. Life is a Sisyphean race, run ever faster toward a finish line that is merely the start of the next race.

Very clearly according to scripture, man’s nature is not an open question but a given fact from God. Then next and of central importance in all that you’re going to be saying in the next few months is this: Man was created in Genesis not as a child, Adam was not born a baby, but a mature man. This is a fact of central importance. Man was created into maturity. As a result, the key command is not child psychology, or animal psychology. Evolution cites that man must be understood in terms of the child, the child in terms of an animal ancestry, and the animal ancestry as an emergent out of chaos!

Man wants to see nature and evolution as separate from human activities. There is a natural world, and there is man. But man also belongs to the natural world. If he is a ferocious predator, that too is part of evolution. If cod and haddock and other species cannot survive because man kills them, something more adaptable will take their place. Nature, the ultimate pragmatist, doggedly searches for something that works. But as the cockroach demonstrates, what works best in nature does not always appeal to us.

We are product of neither nature nor nurture; we are a product of choice, because there is always a space between stimulus and response. As we wisely exercise our power to choose based on principles, the space will become larger.

Man is the result of a purposeless and natural process that did not have him in mind.

"There is no nature that exists devoid of nurture; there is no nurture that develops without nature. To say otherwise is like saying that the area of a field is determined by its length but not its width. Every behavior is the product of an instinct trained by experience.

The study of human beings remained resolutely unreformed by these ideas until a few years ago. Even now, most anthropologists and social scientists are firmly committed to the view that evolution has nothing to tell them. Human bodies are products of "culture," and human culture does not reflect human nature, but the reverse. This restricts social scientists to investigation only differences between cultures and between individuals — and to exaggerating them. Yet what is most interesting to me about human beings is the things that are the same, not what is different — things like grammatical language, hierarchy, romantic love, sexual jealousy, long-term bongs between the genders ("marriage", in a sense). These are trainable instincts peculiar to out species and are just as surely the products of evolution as eyes and thumbs."

If we present a man with a concept of man which is not true, we may well corrupt him. When we present man as an automaton of reflexes, as a mind-machine, as a bundle of instincts, as a pawn of drives and reactions, as a mere product of instinct, heredity and environment, we feed the nihilism to which modern man is, in any case, prone.
I became acquainted with the last stage of that corruption in my second concentration camp, Auschwitz. The gas chambers of Auschwitz were the ultimate consequence of the theory that man is nothing but the product of heredity and environment; or as the Nazi liked to say, ‘of Blood and Soil.’ I am absolutely convinced that the gas chambers of Auschwitz, Treblinka, and Maidanek were ultimately prepared not in some Ministry or other in Berlin, but rather at the desks and lecture halls of nihilistic scientists and philosophers.