Human nature is evil, and goodness is caused by intentional activity.

Human nature is evil; its goodness derives from conscious activity. Now it is human nature to be born with a fondness for profit. Indulging this leads to contention and strife, and the sense of modesty and yielding with which one was born disappears. One is born with feelings of envy and hate, and, by indulging these, one is led into banditry and theft, so that the sense of loyalty and good faith with which he was born disappears. One is born with the desires of the ears and eyes and with a fondness for beautiful sights and sounds, and, by indulging these, one is led to licentiousness and chaos, so that the sense of ritual, rightness, refinement, and principle with which one was born is lost. Hence, following human nature and indulging human emotions will inevitably lead to contention and strife, causing one to rebel against one’s proper duty, reduce principle to chaos, and revert to violence. Therefore one must be transformed by the example of a teacher and guided by the way of ritual and rightness before one will attain modesty and yielding, accord with refinement and ritual, and return to order.

Human nature is said by many to be good; if so, where have social evils come from? For human nature is the only moral nature in that corrupting thing called "society." Every example set before the child of to-day is the fruit of human nature. It has been planted on every possible field — among the snows that never melt; in temperate regions, and under the line; in crowded cities, in lonely forests; in ancient seats of civilization, in new colonies; and in all these fields it has, without once failing, brought forth a crop of sins and troubles.

Human nature is governed by general self-interest and affected by genetic predisposition, which implies that there are likely to be limits to our moral sensitivities.

Human nature is defective. It is selfish. It is cruel and revengeful. It is a product of militancy and hate. It is much better adapted to a fighting life, in which it was generated, than it is in cooperation and peace.

There exists in human nature a strong propensity to depreciate the advantages, and to magnify the evils, of the present times.

The root of humanly caused evil is not man's animal nature, not territorial aggression, or innate selfishness, but our need to gain self-esteem, deny our mortality, and achieve a heroic self-image. Our desire for the best is the cause of the worst.

The more I thought about human nature, the more I saw how our tragic inclination for sin/mistakes causes us to use our minds to rationalize our action.

What we call human nature in actuality is human habit.

Nevertheless, let no one boast. Just as every man, though he be the greatest genius, has very definite limitations in some one sphere of knowledge, and thus attests his common origin with the essentially perverse and stupid mass of mankind, so also has every man something in his nature which is positively evil. Even the best, nay the noblest, character will sometimes surprise us by isolated traits of depravity; as though it were to acknowledge his kinship with the human race, in which villainy — nay, cruelty — is to be found in that degree.

The sweetest and best qualities of our nature may be turned to evil, by the strong force of circumstance and of temptation.

For no man is voluntarily bad; but the bad become bad by reason of an ill disposition of the body and bad education, things which are hateful to every man and happen to him against his will.

Human nature, human nature acts as it acts when it is identified when there is an identity but it is not human nature that has anything to do with that it is that anybody is there where they are, it is that that has to do with identity, with government and propaganda with history with individualism and with communism but it has nothing nothing to do with the human mind … because the human mind writes what there is and what has identity go to do with that … nothing at all.

All moral doctrine, all practical suggestions about how we ought to live, depend on some belief about what human nature is like.