All art (after Duchamp) is conceptual (in nature) because art only exists conceptually.
Joseph KosuthI liked that the work itself was something other than simply what you saw It meant you could have an art work which was that idea of an art work, and its formal components weren't important.
Joseph KosuthAnything can be art. Art is the relations between relations, not the relations between objects.
Joseph KosuthForget your ideas about art. Make a shopping list of everything you like about what you've done. Include qualities that you've seen in your life, in the world, and possibly in art that you like. Take this list and make a work that satisfies all of the things on your list without caring if it looks like art.
Joseph Kosuth