Hume recognizes a very small class of cases for which imaginative association is not needed to recognize beauty. In these cases, initial impressions of the mere “form” of a material object generate approbation (T, 364). Such cases are more typical of natural beauty than art (EPM, 173). So imagination is not always necessary for discovering beauty. Pleasing form is sometimes sufficient. However, “’tis seldom we rest there” (T, 363).