Everyone has their own ideas of what they find brilliant. I am always impressed when people are able to collapse layers of meaning into a dense, but seemingly simple, creative work. Poetry is a perfect example. A succinct phrase of few words that says many things at once while evoking an emotion and also following a predetermined rhythmic form--that's smart. Or really good song writing in which the ideas in the lyrics are supported (or perhaps contradicted) by the melodies, then enhanced by the instrument choices for the accompaniment, and further brought to brilliance by the musical and vocal performances--it moves me.
Silly examples I've found--and it reflects how I've been biding my time lately--are often in children's books. The Very Hungry Caterpillar teaches a life cycle, the days of the week, counting 1-5, an array of fruits and other foods, good eating habits, and metamorphosis, all in a colorfully collaged picture book--so clever.
If these things were an object they could be one of those collapsible tin cups people used to use while camping or at war. Folded down into silver concentric circles, it becomes a perfect compact cylinder, layered from the outside in, flat enough to tuck into your pocket, maybe a meaningful emblem engraved into the lid, and when expanded out to it's fullest, able to hold water and prove life-saving. Hmm, a nice symbol.