His account of _Compassion_ is similar. In the young, the signs and appearances of distress excite a painful feeling, by recalling their own experience of misery. In the old, the connexion between a feeling and its adjuncts has been weakened by experience. Also, when children are brought up together, they are often annoyed by the same things, and this tends powerfully to create a fellow-feeling. Again, when their parents are ill, they are taught to cultivate pity, and are also subjected to unusual restraints. All those things conspire to make children desire to remove the sufferings of others. Various circumstances increase the feeling of pity, as when the sufferers are beloved by us, or are morally good. It is confirmatory of this view, that the most compassionate are those whose nerves are easily irritable, or whose experience of affliction has been considerable. 2.--_The Moral Sense_. Hartley denies the existence of any moral instinct, or any moral judgments, proceeding upon the eternal relations of things. If there be such, let instances of them be produced prior to the influence of associations. Still, our moral approbation or disapprobation is disinterested, and has a factitious independence. (1) Children are taught what is right and wrong, and thus the associations connected with the idea of praise and blame are transferred to the virtues inculcated and the vices condemned. (2) Many vices and virtues, such as sensuality, intemperance, malice, and the opposites, produce _immediate_ consequences of evil and good respectively. (3) The benefits, immediate or (at least) obvious, flowing from the virtues of others, kindle love towards them, and thereafter to the virtues they exhibit. (4) Another consideration is the _loveliness of virtue_, arising from the suitableness of the virtues to each other, and to the beauty, order, and perfection of the world. (5) The hopes and fears connected with a future life, strengthen the feelings connected with virtue. (6) Meditation upon God and prayer have a like effect. 'All the pleasures and pains of sensation, imagination, ambition (pride and vanity), self-interest, sympathy, and theopathy (affection towards God), as far as they are consistent with one another, with the frame of our natures, and with the course of the world, beget in us a moral sense, and lead us to the love and approbation of virtue, and to the fear, hatred, and abhorrence of vice. This moral sense, therefore, carries its own authority with it, inasmuch as it is the sum total of all the rest, and the ultimate result from them; and employs the whole force and authority of the whole nature of man against any particular part of it that rebels against the determinations and commands of the conscience or moral judgment.'