Moral psychology

Moral psychology is the study of moral judgment, moral reasoning, moral sensitivity, moral responsibility, moral motivation, moral identity, moral action, moral development, moral diversity, moral character, altruism, psychological egoism, moral luck, moral forecasting, moral emotion, affective forecasting, and moral disagreement.

• That which enables man to have a real relation to truth and which removes his temptation to lie, must be something independent of all time, something absolutely unchangeable, which as faithfully reproduces the old as if it were new, because it is permanent itself; it can only be that source in which all discrete experiences unite and which creates from the first a continuous existence. It is what produces the feeling of responsibility which oppresses all men, young and old, as to their actions, which makes them know that they are responsible, which leads to the phenomena of repentance and consciousness of sin, which calls to account before an eternal and ever present self things that are long past, its judgment being subtler and more comprehensive than that of any court of law or of the laws of society, and which is exerted by the individual himself quite independently of all social codes (so condemning the moral psychology which would derive morality from the social life of man).
  • Otto Weininger, Sex and Character (1903)