We conceive, in the same manner, a sort of gratitude for those inanimated objects, which have been the causes of great, or frequent pleasure to us. The sailor, who, as soon as he got ashore, should mend his fire with the plank upon which he had just escaped from a shipwreck, would seem to be guilty of an unnatural action. We should expect that he would rather preserve it with care and affection, as a monument that was, in some measure, dear to him. A man grows fond of a snuff-box, of a pen-knife, of a staff which he has long made use of, and conceives something like a real love and affection for them. If he breaks or loses them, he is vexed out of all proportion to the value of the damage. The house which we have long lived in, the tree, whose verdure and shade we have long enjoyed, are both looked upon with a sort of respect that seems due to such benefactors. The decay of the one, or the ruin of the other, affects us with a kind of melancholy, though we should sustain no loss by it. The Dryads and the Lares of the ancients, a sort of genii of trees and houses, were probably first suggested by this sort of affection, which the authors of those superstitions felt for such objects, and which seemed unreasonable, if there was nothing animated about them.
Adam Smith, Theory of Moral Sentiments, II.iii.1.