to the plain man this seems a denial of the existence of matter
it has led to much criticism good and bad beginning with Dr johnson who thought he could refute Berkeley by kicking a stone and continuing till it inspired a recent writer of Limericks
But it dose seem true that the world we know is only made real by the senses we cannot know the world of reality which may or may not lie beneath though with Locke we may think its existence a fair inference from the knowledge of appearance revealed by the senses