There are, indeed, some cases in which we seem to approve without any sympathy or correspondence of sentiments, and in which, consequently, the sentiment of approbation would seem to be different from the perception of this coincidence. A little attention, however, will convince us that even in these cases our approbation is ultimately founded upon a sympathy or correspondence of this kind. I shall give an instance in things of a very frivolous nature, because in them the judgments of mankind are less apt to be perverted by wrong systems. We may often approve of a jest, and think the laughter of the company quite just and proper, though we ourselves do not laugh, because, perhaps, we are in a grave humour, or happen to have our attention engaged with other objects. We have learned, however, from experience, what sort of pleasantry as upon most occasions capable of making us laugh, and we observe that this is one of that kind. We approve, therefore, of the laughter of the company, and feel that it is natural and suitable to its object; because, though in our present mood we cannot easily enter into it, we are sensible that upon most occasions we should very heartily join in it. The same thing often happens with regard to all the other passions. A stranger passes by us in the street with all the marks of the deepest affliction; and we are immediately told that he has just received the news of the death of his father. It is impossible that, in this case, we should not approve of his grief. Yet it may often happen, without any defect of humanity on our part, that, so far from entering into the violence of his sorrow, we should scarce conceive the first movements of concern upon his account. Both he and his father, perhaps, are intirely unknown to us, or we happen to be employed about other things, and do not take time to picture out in our imagination the different circumstances of distress which must occur to him. We have learned, however, from experience, that such a misfortune naturally excites such a degree of sorrow, and we know that if we took time to consider his situation, fully and in all its parts, we should, without doubt, most sincerely sympathize with him. It is upon the consciousness of this conditional sympathy, that our approbation of his sorrow is founded, even in those cases in which that sympathy does not actually take place; and the general rules derived from our preceding experience of what our sentiments would commonly correspond with, correct upon this, as upon many other occasions, the impropriety of our present emotions. The sentiment or affection of the heart from which any action proceeds, and upon which its whole virtue or vice must ultimately depend, may be considered under two different aspects, or in two different relations; first, in relation to the cause which excites it, or the motive which gives occasion to it; and secondly, in relation to the end which it proposes, or the effect which it tends to produce.