Moral certainty

Definition and stakes

Portrait of David Hume David Hume,  An Enquiry Concerning the Principles of Morals (1751)

“ In all determinations of morality, this circumstance of public utility is ever principally in view; and wherever disputes arise, either in philosophy or common life, concerning the bounds of duty, the question cannot, by any means, be decided with greater certainty, than by ascertaining, on any side, the true interests of mankind. If any false opinion, embraced from appearances, has been found to prevail; as soon as farther experience and sounder reasoning have given us juster notions of human affairs, we retract our first sentiment, and adjust anew the boundaries of moral good and evil. ”
Source: Gutenberg

Portrait of Benjamin Rush Benjamin Rush,  Medical Inquiries and Observations…

“ As I consider virtue and vice to consist in action, and not in opinion, and as this action has its seat in the will, and not in the conscience, I shall confine my inquiries chiefly to the influence of physical causes upon that moral power of the mind, which is connected with volition, although many of these causes act likewise upon the conscience, as I shall show hereafter. The state of the moral faculty is visible in actions, which affect the well-being of society. ”
Source: Gutenberg

M. Valentine,  Theoretical Ethics

“ Our consideration of the great truth of the distinction between right and wrong which marks human life in all ages and places, and of the existence and nature of the moral faculty discerning and enforcing this distinction, leads up to an inquiry into the aggregate complex of endowments which are essential to moral agency. The great fact of moral agency is implied and made certain in what has already been brought into view. But the pre-supposition of such moral agency is manifestly the moral agent, with all the requisite endowments for the sublime reality of ethical life. ”
Source: Gutenberg

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