John Locke (1632-1704)
‘the Ideas of primary Qualities of Bodies, are Resemblances of them, and their Patterns really do exist in the Bodies themselves; but the Ideas, produced in us by these Secondary Qualities, have no resemblance of them at all. … There is nothing like our Ideas, existing in the Bodies themselves. … Take away the Sensation of them; let not the Eyes see Light, or Colours, nor the Ears hear Sounds; let the Palate not Taste, nor the Nose Smell, and all Colours, Tastes, Odors, and Sounds, as they are such particular Ideas, vanish and cease, and are reduced to their Causes, i.e., Bulk, Figure, and Motion of Parts.’ — An Essay concerning Human Understanding, book II, chap. viii, 15-17.