Moral duty

Definition and stakes

G. A. Johnston An Introduction to Ethics, for Training Colleges… (1915)

It is always imposed from outside. The authority of parents, the authority of the law of the land, and the authority of God are all alike in this, that the seat of the authority is external to the agent himself. Now a duty is a moral duty only when it is self-imposed. A duty is my duty only when I recognise that, whatever external sanctions it may possess, it is laid upon me by myself. My conscience acknowledges that it is a duty for me, and my will imposes it upon me as a line of action that ought to be carried out. The duty is an obligation laid upon the self by the self.
Source: Wikisource

Portrait of Thomas Paine Thomas Paine The Writings of Thomas Paine, Complete

Thirdly, That the moral duty of man consists in imitating the moral goodness and beneficence of God manifested in the creation towards all his creatures. That seeing as we daily do the goodness of God to all men, it is an example calling upon all men to practise the same towards each other; and, consequently, that every thing of persecution and revenge between man and man, and every thing of cruelty to animals, is a violation of moral duty.
Source: Gutenberg

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