When the original passions of the person principally concerned are in perfect concord with the sympathetic emotions of the spectator, they necessarily appear to this last just and proper, and suitable to their objects; and, on the contrary, when, upon bringing the case home to himself, he finds that they do not coincide with what he feels, they necessarily appear to him unjust and improper, and unsuitable to the causes which excite them. To approve of the passions of another, therefore, as suitable to their objects, is the same thing as to observe that we entirely sympathize with them; and not to approve of them as such, is the same thing as to observe that we do not entirely sympathize with them. The man who resents the injuries that have been done to me, and observes that I resent them precisely as he does, necessarily approves of my resentment. The man whose sympathy keeps time to my grief, cannot but admit the reasonableness of my sorrow. He who admires the same poem, or the same picture, and admires them exactly as I do, must surely allow the justness of my admiration. He who laughs at the same joke, and laughs along with me, cannot well deny the propriety of my laughter. On the contrary, the person who, upon these different occasions, either feels no such emotion as that which I feel, or feels none that bears any proportion to mine, cannot avoid disapproving my sentiments on account of their dissonance with his own. If my animosity goes beyond what the indignation of my friend can correspond to; if my grief exceeds what his most tender compassion can go along with; if my admiration is either too high or too low to tally with his own; if I laugh loud and heartily when he only smiles, or, on the contrary, only smile when he laughs loud and heartily; in all these cases, as soon as he comes from considering the object, to observe how I am affected by it, according as there is more or less disproportion between his sentiments and mine, I must incur a greater or less degree of his disapprobation: and upon all occasions his own sentiments are the standards and measures by which he judges of mine. To approve of another man’s opinions is to adopt those opinions, and to adopt them is to approve of them. If the same arguments which convince you convince me likewise, I necessarily approve of your conviction; and if they do not, I necessarily disapprove of it: neither can I possibly conceive that I should do the one without the other. To approve or disapprove, therefore, of the opinions of others is acknowledged, by every body, to mean no more than to observe their agreement or disagreement with our own. But this is equally the case with regard to our approbation or disapprobation of the sentiments or passions of others.