Page:Four Dissertations - David Hume (1757).djvu/149

 lancing and tempering each other, will subsist together, and by their union, produce a third impression or affection, such as hope or fear.

influence of the relations of ideas (which we shall afterwards explain more fully) is plainly seen in this affair. In contrary passions, if the objects be totally different, the passions are like two opposite liquors in different bottles, which have no influence on each other. If the objects be intimately connected, the passions are like an alcali or an acid, which, being mingled, destroy each other. If the relation be more imperfect, and consists in the contradictory views of the same object, the passions are like oil and vinegar, which, however mingled, never perfectly unite and incorporate.

effect of a mixture of passions, when one of them is predominant and swallows up the other, shall be explained afterwards.