David Hume

“ If we consider the causes of love and hatred, we shall find they are very much diversify'd, and have not many things in common. The virtue, knowledge, wit, good sense, good humour of any person, produce love and esteem; as the opposite qualities, hatred and contempt. The same passions arise from bodily accomplishments, such as beauty, force, swiftness, dexterity ”

“ One of these suppositions, viz. that the cause of love and hatred must be related to a person or thinking being, in order to produce these passions, is not only probable, but too evident to be contested. Virtue and vice, when consider'd in the abstract; beauty and deformity, when plac'd on inanimate objects; poverty and riches, when belonging to a third person, excite no degree of love or hatred, esteem or contempt towards those, who have no relation to them. ”

“ There are few persons, that are satisfy'd with their own character, or genius, or fortune, who are not desirous of shewing themselves to the world, and of acquiring the love and approbation of mankind. Now 'tis evident, that the very same qualities and circumstances, which are the causes of pride or self-esteem, are also the causes of vanity or the desire of reputation ”

“ But if love and esteem were not produc'd by the same qualities as pride, according as these qualities are related to ourselves or others, this method of proceeding wou'd be very absurd, nor cou'd men expect a correspondence in the sentiments of every other person, with those themselves have entertain'd. 'Tis true, few can form exact systems of the passions, or make reflections on their general nature and resemblances. ”